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Document and Entity Information - USD ($)	12 Months Ended
Document and Entity Information - USD ($)	Mar. 31, 2018	May 04, 2018	Sep. 30, 2017
Document and Entity Information
Entity Registrant Name	TAKE TWO INTERACTIVE SOFTWARE INC
Entity Central Index Key	0000946581
Document Type	10-K
Document Period End Date	Mar. 31, 2018
Amendment Flag	false
Current Fiscal Year End Date	--03-31
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Public Float			$ 11,405,142,125
Entity Common Stock, Shares Outstanding		114,379,624
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	FY

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2018	Mar. 31, 2017
Current assets:
Cash and cash equivalents	$ 808,973	$ 943,396
Short-term investments	615,406	448,932
Restricted cash	437,398	337,818
Accounts receivable, net of allowances of $54,290 and $66,483 at March 31, 2018 and 2017, respectively	247,649	219,558
Inventory	15,162	16,323
Software development costs and licenses	33,284	41,721
Deferred cost of goods sold	117,851	127,901
Prepaid expenses and other	133,454	59,593
Total current assets	2,409,177	2,195,242
Fixed assets, net	102,478	67,300
Software development costs and licenses, net of current portion	639,369	381,910
Deferred cost of goods sold, net of current portion	26,719	0
Goodwill	399,530	359,115
Other intangibles, net	103,681	110,262
Other assets	56,887	35,325
Total assets	3,737,841	3,149,154
Current liabilities:
Accounts payable	35,029	31,892
Accrued expenses and other current liabilities	914,748	750,875
Deferred revenue	777,152	903,125
Total current liabilities	1,726,929	1,685,892
Long-term debt	8,068	251,929
Non-current deferred revenue	355,589	10,406
Other long-term liabilities	158,285	197,199
Total liabilities	2,248,871	2,145,426
Commitments and contingencies
Stockholders' equity:
Preferred stock, $.01 par value, 5,000 shares authorized: no shares issued and outstanding at March 31, 2018 and 2017	0	0
Common stock, $.01 par value, 200,000 shares authorized; 132,743 and 119,813 shares issued and 114,038 and 102,621 outstanding at March 31, 2018 and 2017, respectively	1,327	1,198
Additional paid-in capital	1,888,039	1,452,754
Treasury stock, at cost; 18,705 and 17,192 common shares at March 31, 2018 and 2017, respectively	(458,180)	(303,388)
Retained earnings (accumulated deficit)	73,516	(99,694)
Accumulated other comprehensive loss	(15,732)	(47,142)
Total stockholders' equity	1,488,970	1,003,728
Total liabilities and stockholders' equity	$ 3,737,841	$ 3,149,154

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2018	Mar. 31, 2017
Statement of Financial Position [Abstract]
Accounts receivable, allowances	$ 54,290	$ 66,483
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	5,000,000	5,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	200,000,000	200,000,000
Common stock, shares issued (in shares)	132,743,000	119,813,000
Common stock, shares outstanding (in shares)	114,038,000	102,621,000
Treasury stock, shares (in shares)	18,705,000	17,192,000

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Income Statement [Abstract]
Net revenue	$ 1,792,892	$ 1,779,748	$ 1,413,698
Cost of goods sold	898,311	1,022,959	813,873
Gross profit	894,581	756,789	599,825
Selling and marketing	256,092	285,453	198,309
General and administrative	247,828	211,409	192,452
Research and development	196,373	137,915	119,807
Business reorganization	14,742	0	71,285
Depreciation and amortization	43,969	30,707	28,800
Total operating expenses	759,004	665,484	610,653
Income (loss) from operations	135,577	91,305	(10,828)
Interest and other, net	1,048	(15,690)	(30,205)
Gain on long-term investments, net	0	1,350	2,683
Income (loss) before income taxes	136,625	76,965	(38,350)
(Benefit from) provision for income taxes	(36,908)	9,662	(30,048)
Net income (loss)	$ 173,533	$ 67,303	$ (8,302)
Earnings (loss) per share:
Basic earnings (loss) per share (in dollars per share)	$ 1.57	$ 0.73	$ (0.10)
Diluted earnings (loss) per share (in dollars per share)	$ 1.54	$ 0.72	$ (0.10)

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 173,533	$ 67,303	$ (8,302)
Other comprehensive income (loss):
Foreign currency translation adjustment	43,379	(9,086)	(7,364)
Cash flow hedges:
Change in unrealized gains	(8,153)	0	0
Reclassification to earnings	0	0	(17)
Tax effect on cross-currency swap	(2,038)	0	0
Change in fair value of cash flow hedges	(10,191)	0	(17)
Available-for-sale securities:
Net unrealized gain (loss), net of taxes	(1,778)	(169)	73
Reclassification to earnings for realized net loss, net of taxes	0	9	36
Change in fair value of available-for-sale securities	(1,778)	(160)	109
Other comprehensive income (loss)	31,410	(9,246)	(7,272)
Comprehensive income (loss)	$ 204,943	$ 58,057	$ (15,574)

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Operating activities:
Net income (loss)	$ 173,533	$ 67,303	$ (8,302)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Amortization and impairment of software development costs and licenses	77,887	221,911	134,472
Stock-based compensation	116,349	81,879	69,996
Amortization of intellectual property	34,830	6,738	160
Depreciation	32,202	30,707	28,800
Amortization of discount on Convertible Notes	15,662	21,222	23,457
Impairment of in-process research and development	11,257	0	0
Amortization of debt issuance costs	578	1,227	1,567
Deferred income taxes	(32,523)	3,020	(270)
Gain on long-term investments, net	0	(1,350)	(2,683)
Gain on redemption of Convertible Notes	(4,900)	0	0
Other, net	6,375	(3,410)	2,588
Changes in assets and liabilities:
Restricted cash	(99,580)	(76,474)	(91,491)
Accounts receivable	(26,998)	(41,956)	49,348
Inventory	3,917	(4,942)	3,809
Software development costs and licenses	(225,269)	(252,951)	(219,217)
Prepaid expenses, other current and other non-current assets	(74,544)	(22,155)	(12,272)
Deferred revenue	198,397	126,285	152,325
Deferred cost of goods sold	(11,959)	(14,969)	(41,144)
Accounts payable, accrued expenses and other liabilities	198,733	189,344	170,162
Net cash provided by operating activities	393,947	331,429	261,305
Investing activities:
Change in bank time deposits	(40,918)	89,076	(182,383)
Proceeds from available-for-sale securities	241,012	155,936	43,314
Purchases of available-for-sale securities	(369,998)	(221,671)	(150,501)
Purchases of fixed assets	(61,557)	(21,167)	(37,280)
Proceeds from sale of long-term investment	0	1,350	2,683
Purchase of long-term investments	(5,000)	(1,885)	0
Business acquisitions, net of cash acquired	(9,401)	(130,669)	0
Asset acquisition	(25,965)	0	0
Other	0	0	(349)
Net cash used in investing activities	(271,827)	(129,030)	(324,516)
Financing activities:
Tax payment related to net share settlements on restricted stock awards	(112,884)	(51,762)	(22,916)
Repurchase of common stock	(154,792)	0	(26,552)
Excess tax benefit from stock-based compensation	0	1,990	1,421
Other	(13,791)	0	0
Net cash used in financing activities	(281,467)	(49,772)	(48,047)
Effects of foreign currency exchange rates on cash and cash equivalents	24,924	(7,973)	(1,120)
Net change in cash and cash equivalents	(134,423)	144,654	(112,378)
Cash and cash equivalents, beginning of year	943,396	798,742	911,120
Cash and cash equivalents, end of year	808,973	943,396	798,742
Supplemental data:
Interest paid	4,121	7,628	7,626
Income taxes paid (refunded)	$ 8,790	$ 6,648	$ (26,223)

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Treasury Stock	Retained Earnings/(Accumulated Deficit)	Accumulated Other Comprehensive Income (Loss)	1.75% Convertible Notes due 2016	1.75% Convertible Notes due 2016 Common Stock	1.75% Convertible Notes due 2016 Additional Paid-in Capital	1.00% Convertible Notes due 2018	1.00% Convertible Notes due 2018 Common Stock	1.00% Convertible Notes due 2018 Additional Paid-in Capital
Balance (in shares) at Mar. 31, 2015		(104,594)		(16,238)
Balance at Mar. 31, 2015	$ 563,088	$ 1,046	$ 1,028,197	$ (276,836)	$ (158,695)	$ (30,624)
Increase (Decrease) in Stockholders' Equity
Net income (loss)	(8,302)				(8,302)
Change in cumulative foreign currency translation adjustment	(7,364)					(7,364)
Change in unrealized gains on derivative instruments, net	(17)					(17)
Net unrealized gain on available-for-sale securities, net of taxes	109					109
Stock-based compensation	83,137		83,137
Tax benefit associated with stock awards	1,421		1,421
Issuance of restricted stock, net of forfeitures and cancellations (in shares)		(84)
Issuance of restricted stock, net of forfeitures and cancellations	0	$ (1)	1
Repurchased common stock (in shares)				(954)
Repurchased common stock	(26,552)			$ (26,552)
Net share settlement of restricted stock awards (in shares)		(745)
Net share settlement of restricted stock awards	(24,135)	$ (7)	(24,128)
Balance (in shares) at Mar. 31, 2016		(103,765)		(17,192)
Balance at Mar. 31, 2016	581,385	$ 1,038	1,088,628	$ (303,388)	(166,997)	(37,896)
Increase (Decrease) in Stockholders' Equity
Net income (loss)	67,303				67,303
Change in cumulative foreign currency translation adjustment	(9,086)					(9,086)
Net unrealized gain on available-for-sale securities, net of taxes	(160)					(160)
Stock-based compensation	88,378		88,378
Tax benefit associated with stock awards	1,990		1,990
Issuance of restricted stock, net of forfeitures and cancellations (in shares)		(1,738)
Issuance of restricted stock, net of forfeitures and cancellations	0	$ 17	(17)
Settlement/Conversion of Convertible Notes (in shares)								13,094			899
Conversion of Convertible Notes							$ 249,997	$ 131	$ 249,866	$ 18,341	$ 9	$ 18,332
Issuance of shares related to Social Point acquisition (in shares)		1,480
Issuance of shares related to Social Point acquisition	57,342	$ 15	57,327
Net share settlement of restricted stock awards (in shares)		(1,163)
Net share settlement of restricted stock awards	$ (51,762)	$ (12)	(51,750)
Balance (in shares) at Mar. 31, 2017	(119,813)	(119,813)		(17,192)
Balance at Mar. 31, 2017	$ 1,003,728	$ 1,198	1,452,754	$ (303,388)	(99,694)	(47,142)
Increase (Decrease) in Stockholders' Equity
Net income (loss)	173,533				173,533
Change in cumulative foreign currency translation adjustment	43,379					43,379
Change in unrealized gains on derivative instruments, net	(10,191)					(10,191)
Net unrealized gain on available-for-sale securities, net of taxes	(1,778)					(1,778)
Stock-based compensation	293,214		293,214
Issuance of restricted stock, net of forfeitures and cancellations (in shares)		(2,151)
Issuance of restricted stock, net of forfeitures and cancellations	0	$ 21	(21)
Repurchased common stock (in shares)				(1,513)
Repurchased common stock	(154,792)			$ (154,792)
Settlement/Conversion of Convertible Notes (in shares)											12,082
Conversion of Convertible Notes										$ 255,084	$ 121	$ 254,963
Net share settlement of restricted stock awards (in shares)		(1,303)
Net share settlement of restricted stock awards	$ (112,884)	$ (13)	(112,871)
Balance (in shares) at Mar. 31, 2018	(132,743)	(132,743)		(18,705)
Balance at Mar. 31, 2018	$ 1,488,970	$ 1,327	$ 1,888,039	$ (458,180)	$ 73,516	$ (15,732)
Increase (Decrease) in Stockholders' Equity
Adoption of ASU 2016-09	$ (323)

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Parenthetical)	Mar. 31, 2018
1.75% Convertible Notes due 2016
Interest rate	1.75%
1.00% Convertible Notes due 2018
Interest rate	1.00%

BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES

12 Months Ended

Mar. 31, 2018

Accounting Policies [Abstract]

BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES

Take-Two Interactive Software, Inc. (the "Company," "we," "us," or similar pronouns) was incorporated in the state of Delaware in 1993. We are a leading developer, publisher, and marketer of interactive entertainment for consumers around the globe. We develop and publish products principally through our two wholly-owned labels Rockstar Games and 2K, as well as our new Private Division label and Social Point, a leading developer of mobile games. Our products are designed for console systems and personal computers, including smart phones and tablets, and are delivered through physical retail, digital download, online platforms and cloud streaming services.

Principles of Consolidation

The Consolidated Financial Statements include the financial statements of the Company and its wholly-owned subsidiaries. All inter-company balances and transactions have been eliminated in consolidation.

Reclassifications

Certain immaterial amounts in the financial statements of the prior years have been reclassified to conform to the current year presentation for comparative purposes.

Use of Estimates

The preparation of financial statements in conformity with U.S. generally accepted accounting principles ("U.S. GAAP") requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the dates of the financial statements and the reported amounts of net revenue and expenses during the reporting periods. Our most significant estimates and assumptions relate to the recoverability of software development costs and prepaid royalties, licenses and intangibles, valuation of inventories, realization of deferred income taxes, the adequacy of price protection, allowances for sales returns and doubtful accounts, accrued liabilities, the service period for deferred net revenue and related cost of goods sold, fair value estimates, the valuation of stock-based compensation, and assumptions used in our goodwill impairment tests. These estimates generally involve complex issues and require us to make judgments, involve analysis of historical and the prediction of future trends, and are subject to change from period to period. Actual amounts could differ significantly from these estimates. The Company considers transactions or events that occur after the balance sheet date, but before the financial statements are issued, to provide additional evidence relative to certain estimates or to identify matters that require additional disclosures.

Concentration of Credit Risk and Accounts Receivable

We maintain cash balances at several major financial institutions. While we attempt to limit credit exposure with any single institution, balances often exceed insurable amounts.

If the financial condition and operations of our customers deteriorate, our risk of collection could increase substantially. A majority of our trade receivables are derived from sales to major retailers and distributors. Our five largest customers accounted for 70.7% 65.5% and 58.9% of net revenue during the fiscal years ended March 31, 2018, 2017 and 2016, respectively. One customer accounted for 30.2%, 26.3% and 20.7% of net revenues during the fiscal years ended March 31, 2018, 2017, and 2016, respectively. A second customer accounted for 17.6%, 14.2%, and 15.5% of net revenue during the fiscal years ended March 31, 2018, 2017, and 2016 respectively. A third customer accounted for 10.9% of net revenue during the fiscal year ended March 31, 2017. As of March 31, 2018 and 2017, five customers accounted for 65.4% and 69.9% of our gross accounts receivable, respectively. Customers that individually accounted for more than 10% of our gross accounts receivable balance comprised 53.2% and 57.6% of such balances at March 31, 2018 and 2017, respectively. We had two customers who accounted for 37.7% and 15.5% of our gross accounts receivable as of March 31, 2018 and two customers who accounted for 40.2% and 17.4% of our gross accounts receivable as of March 31, 2017. We did not have any additional customers that exceeded 10% of our gross accounts receivable as of March 31, 2018 and 2017. Based upon performing ongoing credit evaluations, maintaining trade credit insurance on a majority of our customers and our past collection experience, we believe that the receivable balances from these largest customers do not represent a significant credit risk.

Cash and Cash Equivalents

We consider all highly liquid instruments purchased with original maturities of three months or less to be cash equivalents. Our restricted cash balance is primarily related to a dedicated account limited to the payment of certain internal royalty obligations.

Short-term Investments

Short-term investments designated as available-for-sale securities are carried at fair value, which is based on quoted market prices for such securities, if available, or is estimated on the basis of quoted market prices of financial instruments with similar characteristics. Investments with original maturities greater than 90 days and remaining maturities of less than one year are normally classified within short-term investments. In addition, investments with maturities beyond one year at the time of purchase that are highly liquid in nature and represent the investment of cash that is available for current operations are classified as short-term investments.

Unrealized gains and losses of available-for-sale securities are excluded from earnings and are reported as a component of other comprehensive (loss) income, net of tax, until the security is sold, the security has matured, or we determine that the fair value of the security has declined below its adjusted cost basis and the decline is other-than-temporary. Realized gains and losses on short-term investments are calculated based on the specific identification method and would be reclassified from accumulated other comprehensive loss to interest and other, net.

Short-term investments are evaluated for impairment quarterly. We consider various factors in determining whether we should recognize an impairment charge, including the credit quality of the issuer, the duration that the fair value has been less than the adjusted cost basis, the severity of the impairment, the reason for the decline in value, and our intent to sell and ability to hold the investment for a period of time sufficient to allow for any anticipated recovery in market value. If we conclude that an investment is other-than-temporarily impaired, it recognizes an impairment charge at that time in the Consolidated Statements of Operations. In determining whether the decline in fair value is other-than-temporary requires management judgment based on the specific facts and circumstances of each security. The ultimate value realized on these securities is subject to market price volatility until they are sold.

Inventory

Inventory consists of materials, including manufacturing royalties paid to console manufacturers, and is stated at the lower of weighted average cost or net realizable value. Estimated product returns are included in the inventory balance at their cost. We regularly review inventory quantities on-hand and in the retail channels and record an inventory provision for excess or obsolete inventory based on the future expected demand for our products. Significant changes in demand for our products would affect management's estimates in establishing our inventory provision. We write down inventory based on excess or obsolete inventories determined primarily by future anticipated demand for our products. Inventory write-downs are measured as the difference between the cost of the inventory and market value, based upon assumptions about future demand that are inherently difficult to assess.

Software Development Costs and Licenses

Capitalized software development costs include direct costs incurred for internally developed titles and payments made to third-party software developers under development agreements.

We capitalize internal software development costs (including specifically identifiable employee stock-based compensation, payroll expense, and incentive compensation costs related to the completion and release of titles, as well as third-party production and other content costs), subsequent to establishing technological feasibility of a software title. Technological feasibility of a product includes the completion of both technical design documentation and game design documentation. Significant management judgments are made in the assessment of when technological feasibility is established. For products where proven technology exists, this may occur early in the development cycle. Technological feasibility is evaluated on a product-by-product basis.

We enter into agreements with third-party developers that require us to make payments for game development and production services. In exchange for our payments, we receive the exclusive publishing and distribution rights to the finished game title as well as, in some cases, the underlying intellectual property rights. Such agreements typically allow us to fully recover these payments to the developers at an agreed upon royalty rate earned on the subsequent sales of such software, net of any agreed upon costs. Prior to establishing technological feasibility of a product, we record any costs incurred by third-party developers as research and development expenses. Subsequent to establishing technological feasibility of a product, we capitalize all development and production service payments to third-party developers as software development costs and licenses. We typically enter into agreements with third-party developers after completing the technical design documentation for our products and therefore record the design costs leading up to a signed development contract as research and development expense. When we contract with third-party developers, we generally select those that have proven technology and experience in the genre of the software being developed, which often allows for the establishment of technological feasibility early in the development cycle. In instances where the documentation of the design and technology are not in place prior to an executed contract, we monitor the software development process and require our third-party developers to adhere to the same technological feasibility standards that apply to our internally developed products.

Licenses consist of payments and guarantees made to holders of intellectual property rights for use of their trademarks, copyrights or other intellectual property rights in the development of our products. Agreements with license holders generally provide for guaranteed minimum payments for use of their intellectual property. Certain licenses, especially those related to our sports products, extend over multi-year periods and encompass multiple game titles. In addition to guaranteed minimum payments, these licenses frequently contain provisions that could require us to pay royalties to the license holder based on pre-agreed unit sales thresholds.

Amortization of capitalized software development costs and licenses commences when a product is available for general release and is recorded on a title-by-title basis in cost of goods sold. For capitalized software development costs, amortization is calculated using (1) the proportion of current year revenues to the total revenues expected to be recorded over the life of the title or (2) the straight-line method over the remaining estimated life of the title, whichever is greater. For capitalized licenses, amortization is calculated as a ratio of (1) current period revenues to the total revenues expected to be recorded over the remaining estimated life of the title or (2) the contractual royalty rate based on actual net product sales as defined in the licensing agreement, whichever is greater.

We evaluate the future recoverability of capitalized software development costs and licenses on a quarterly basis. Recoverability is primarily assessed based on the actual title's performance. For products that are scheduled to be released in the future, recoverability is evaluated based on the expected performance of the specific products to which the cost or license relates. We utilize a number of criteria in evaluating expected product performance, including historical performance of comparable products developed with comparable technology; market performance of comparable titles; orders for the product prior to its release; general market conditions; and, past performance of the franchise. When we determine that capitalized cost of the title is unlikely to be recovered by product sales, an impairment of software development and license capitalized costs is charged to cost of goods sold in the period in which such determination is made.

We have profit and unit sales based internal royalty programs that allow selected employees to each participate in the success of software titles that they assist in developing. Royalties earned under this program are recorded as a component of cost of goods sold in the period earned.

Fixed Assets, net

Office equipment, furniture and fixtures are depreciated using the straight-line method over their estimated useful life of five years. Computer equipment and software are generally depreciated using the straight-line method over three to five years. Leasehold improvements are amortized over the lesser of the term of the related lease or the useful life of the underlying asset, typically seven years. The cost of additions and betterments are capitalized, and repairs and maintenance costs are charged to operations, in the periods incurred. When depreciable assets are retired or sold, the cost and related allowances for depreciation are removed from the accounts and the gain or loss, if any, is recognized. The carrying amounts of these assets are recorded at historical cost.

Goodwill and Intangible Assets

Goodwill is the excess of purchase price paid over identified intangible and tangible net assets of acquired companies. Intangible assets consist of intellectual property, developed game technology, analytics technology, user base, trade names, and in-process research and development. Certain intangible assets acquired in a business combination are recognized as assets apart from goodwill.

We use either the income, cost or market approach to aid in our conclusions of such fair values and asset lives. The income approach presumes that the value of an asset can be estimated by the net economic benefit to be received over the life of the asset, discounted to present value. The cost approach presumes that an investor would pay no more for an asset than its replacement or reproduction cost. The market approach estimates value based on what other participants in the market have paid for reasonably similar assets. Although each valuation approach is considered in valuing the assets acquired, the approach ultimately selected is based on the characteristics of the asset and the availability of information.

We test our goodwill for impairment annually, at the beginning of August, or more frequently if events and circumstances indicate the fair value of a reporting unit may be below its carrying amount. A reporting unit is defined as an operating segment or one level below an operating segment. We have determined that we operate in two reporting units, which are components of our operating segment. In the evaluation of goodwill for impairment, we have the option to first perform a qualitative assessment to determine if the fair value of a reporting unit is more likely than not (i.e., a likelihood of more than 50%) less than the carrying value before performing the two-step impairment test.

When a qualitative assessment is not used, or if the qualitative assessment is not conclusive, the impairment analysis for goodwill is performed at the reporting unit level using a two-step approach. The first step of the goodwill impairment test is used to identify potential impairment by comparing the fair value of a reporting unit with its carrying amount, including goodwill. If the fair value of the reporting unit exceeds its carrying value, step two does not need to be performed. If the carrying value exceeds the fair value, there is a potential impairment, and step two must be performed. In performing the quantitative assessment in step one, we measure the fair value of the reporting unit using a combination of the income approach, which uses discounted cash flows, and the market approach, which uses market capitalization and data for comparable companies.

Each step requires us to make judgments and involves the use of significant estimates and assumptions. These estimates and assumptions include long-term growth rates and operating margins used to calculate projected future cash flows, risk-adjusted discount rates based on our weighted average cost of capital, future economic and market conditions and the determination of appropriate market comparables. Our estimates for market growth are based on historical data, various internal estimates and observable external sources when available, and are based on assumptions that are consistent with the plans and estimates we use to manage the underlying business.

Step two compares the carrying value of the reporting unit's goodwill to its implied fair value (i.e., fair value of reporting unit less the fair value of the unit's assets and liabilities, including identifiable intangible assets). If the implied fair value of goodwill is less than the carrying amount of goodwill, an impairment is recognized. Based on our annual impairment assessment process for goodwill, no impairments were recorded during the fiscal years ended March 31, 2018, 2017 or 2016.

Long-lived Assets

We review all long-lived assets for impairment whenever events or changes in circumstances indicate that the related carrying amount of an asset or asset group may not be recoverable. We compare the carrying amount of the asset to the estimated undiscounted future cash flows expected to result from the use of the asset. If the carrying amount of the asset exceeds estimated expected undiscounted future cash flows, we record an impairment charge for the difference between the carrying amount of the asset and its fair value. The estimated fair value is generally measured by discounting expected future cash flows using our incremental borrowing rate or fair value, if available. As of March 31, 2018, no indicators of impairment existed.

Derivatives and Hedging

We transact business in various foreign currencies and have significant sales and purchase transactions denominated in foreign currencies, subjecting us to foreign currency exchange rate risk. From time to time, we carry out transactions involving foreign currency exchange derivative financial instruments. The transactions are designed to hedge our exposure in currency exchange rate movements. We recognize derivative instruments as either assets or liabilities on our Consolidated Balance Sheets and we measure those instruments at fair value. The changes in fair value of derivatives that are not designated as hedges are recognized currently in earnings as interest and other, net in our Consolidated Statements of Operations. If a derivative meets the definition of a cash flow hedge and is so designated, the effective portion of changes in the fair value of the derivative are recognized, as a component of other comprehensive income (loss) while the ineffective portion of the changes in fair value is recorded currently in earnings as interest and other, net in our Consolidated Statements of Operations. Amounts included in Accumulated other comprehensive income (loss) for cash flow hedges are reclassified into earnings in the same period that the hedged item is recognized in Cost of goods sold, Research and development expenses, or Interest and other, net, as appropriate.

Income Taxes

We record a tax provision for the anticipated tax consequences of the reported results of operations. Our provision for income taxes is computed using the asset and liability method, under which deferred income taxes are recognized for differences between the financial statement and tax bases of assets and liabilities at currently enacted statutory tax rates for the years in which the differences are expected to reverse. The effect on deferred taxes of a change in tax rates is recognized in income in the period that includes the enactment.

Valuation allowances are established when we determine that it is more likely than not that such deferred tax assets will not be realized. We do not record income tax expense related to foreign withholding taxes or United States income taxes that may become payable upon the repatriation of undistributed earnings of foreign subsidiaries, as such earnings are expected to be reinvested indefinitely outside of the United States.

We use estimates and assumptions to compute the provision for income taxes including allocations of certain transactions to different tax jurisdictions, amounts of permanent and temporary differences, the likelihood of deferred tax assets being recovered and the outcome of contingent tax risks. These estimates and assumptions are revised as new events occur, more experience is acquired and additional information is obtained. The effect of these revisions is recorded in income tax expense or benefit in the period in which they become known.

On December 22, 2017, the U.S. enacted comprehensive tax legislation commonly referred to as the Tax Cuts and Jobs Act (herein referred to as the "Act”). The Act also subjects a U.S. shareholder to tax on global intangible low-taxed income (GILTI) earned by certain foreign subsidiaries. The FASB Staff Q&A, Topic 740, No. 5, Accounting for Global Intangible Low-Taxed Income, states that an entity can make an accounting policy election to either recognize deferred taxes for temporary basis differences expected to reverse as GILTI in future years or provide for the tax expense related to GILTI in the year the tax is incurred. Given the complexity of the GILTI provisions, the Company is still evaluating the effects of the GILTI provisions and has not yet determined its accounting policy. At March 31, 2018, because the Company is still evaluating the GILTI provisions and analysis of future taxable income that is subject to GILTI, it is unable to make a reasonable estimate and has not reflected any adjustments related to GILTI in its Consolidated Financial Statements.

Revenue Recognition

We recognize revenue on the sales of software products upon the transfer of title and risk of loss to our customers. Accordingly, we recognize revenue for software titles when there is (1) persuasive evidence that an arrangement with the customer exists, (2) the product is delivered, (3) the selling price is fixed or determinable and (4) collection of the customer receivable is deemed probable. Certain products are sold to customers with a street date (i.e., the earliest date these products may be sold by retailers). For these products, we recognize revenue on the later of the street date or the sale date. In addition, some of our software products are sold as full game digital downloads and digital add-on content for which the consumer takes possession of the digital content for a fee. Revenue from product downloads is generally recognized when the download is made available to the end user (assuming all other recognition criteria are met).

In providing credit terms to our customers, our payment arrangements typically provide net 30 and 60 day terms. Advances received for licensing and exclusivity arrangements are reported on our Consolidated Balance Sheets as deferred revenue until we meet our performance obligations, at which point we recognize the revenue.

For some of our software products, we enter into multiple element revenue arrangements in which we may provide a combination of full game software, online multi-player functionality, and related post-contract customer support ("PCS") which generally includes additional free unspecified add-on content updates, maintenance, and online support services. For these arrangements, we evaluate the significance of the PCS at the time each game is released based on the guidance in Accounting Standards Codification 985-605, "Software—Revenue Recognition" ("ASC 985-605") to determine if the PCS rises to the level of a separate deliverable. We monitor our initial assessments on an ongoing basis and consider any changes that may arise. In conjunction with our evaluation, we consider such factors as the significance of the development effort, the nature of online features, the extent of anticipated marketing focus on online features, the significance of the online features to the consumers' anticipated overall gameplay experience, and the significance and length of time of our post sale obligations to consumers. Determining whether PCS is significant for a particular game is subjective and requires management's judgment.

When a software arrangement includes multiple elements, the arrangement consideration is allocated to each revenue element based on the relative fair value of vendor specific objective evidence ("VSOE") for each element. When VSOE of fair value does not exist for all of the elements in the arrangement, ASC 985-605 requires either the use of the residual method or the deferral of revenue until the earlier point at which VSOE of fair value exists for any undelivered element or until only one undelivered element remains. For arrangements that require the deferral of revenue, the related cost of goods sold is deferred and recognized as the related net revenue is recognized. Deferred cost of goods sold includes product costs and licenses. We do not have VSOE for our PCS obligations and in those arrangements where PCS obligations have been determined to be significant we recognize revenue from the sale of software products and the related cost of goods sold ratably over the period we expect to offer the PCS to the consumer ("estimated service period"), assuming all other recognition criteria are met. We also do not have VSOE for our online multi-player functionality; however, it is generally delivered at the same time with the full game software. Determining the estimated service period is subjective and requires management's judgment, therefore, the estimated service period may change in the future. The estimated service periods of our current games with online functionality and related PCS are generally 12 months, with the exception of GTA, which is 62 months (see below).

When our software products provide insignificant PCS at no additional cost to the consumer, we recognize revenue when the four primary revenue recognition criteria described above have been met for all other deliverables in the arrangement and, in those situations, we estimate and accrue the future costs of providing those services.

Certain of our games provide consumers with the option to purchase virtual currency to use in the game to acquire virtual goods. We currently recognize revenue from the sale of virtual currency, using the game-based model, ratably over the estimated remaining life of the game. Because the service period for our online-enabled games with significant PCS is not an explicitly defined period, we must make an estimate of the service offering period for purposes of recognizing revenue. The estimated service period for current deferred title offerings is based on our estimate of the economic game life of the respective title. Determining the estimated service period (or economic game life) is inherently subjective and is subject to regular revision based on numerous factors and considerations. The factors that we primarily consider as part of our process of initially determining and subsequently reassessing estimated service periods for our titles include:


•	the period of time over which the substantial majority of a respective title’s estimated lifetime game sales and in-game virtual currency sales are expected to occur;


•	the period of time over which we plan to provide free unspecified add-on content updates, maintenance or other remaining material online support services associated with our online-enabled games;


•	the time over which we plan to dedicate internal resources to support the online functionality of a title;


•	known and expected online gameplay trends;


•	the results from prior analyses;


•	the nature of the game (e.g., annual title, genre, period of time between franchise title releases, etc.); and


•	the disclosed service periods for competitors’ games.

To the extent we have recorded significant amounts of revenue deferred for specific titles, changes in the estimated service periods could have a material impact on the revenue recognized in a particular period.

As part of our on-going assessment of estimated service periods during the fiscal year ended March 31, 2018, based on the factors described above and new information obtained during the period, we changed Grand Theft Auto V's estimated service period to extend the estimated game life through December 2019. The impact of the change is shown in the table below.



	Fiscal Year Ended
	March 31, 2018
Change in net revenue	$	(271,741	)
Change in income from operations	(250,589		)
Change in net income	(212,925		)
Change in earnings per share, basic	$	(1.93	)
Change in earnings per share, diluted	$	(1.81	)

Revenue is recognized after deducting estimated price protection, reserves for returns and other allowances. In circumstances when we do not have a reliable basis to estimate price protection, returns and other allowances or are unable to determine that collection of a receivable is probable, we defer the revenue until we can reliably estimate any related returns and allowances and determine that collection of the receivable is probable.

Price Protection and Allowances for Returns

We grant price protection and accept returns in connection with our distribution arrangements with customers. Following reductions in the price of our products, we grant price protection to permit customers to take credits against amounts they owe us with respect to merchandise unsold by them. Our customers must satisfy certain conditions to entitle them to receive price protection or return products, including compliance with applicable payment terms and confirmation of field inventory levels.

Generally, our distribution arrangements with customers do not give them the right to return titles or to cancel firm orders. However, we occasionally accept returns from our customers for stock balancing and make accommodations to customers, which include credits and returns, when demand for specific titles falls below expectations.

We make estimates of future price protection and product returns related to current period product revenue. We estimate the amount of future price protection and returns for published titles based upon, among other factors, historical experience and performance of the titles in similar genres, historical performance of the hardware platform, customer inventory levels, analysis of sell-through rates, sales force and retail customer feedback, industry pricing, market conditions and changes in demand and acceptance of our products by consumers.

Significant management judgments and estimates must be made and used in connection with establishing price protection and the allowance for returns in any accounting period. We believe we can make reliable estimates of price protection and returns. However, actual results may differ from initial estimates as a result of changes in circumstances, market conditions and assumptions. Adjustments to estimates are recorded in the period in which they become known.

Consideration Given to Customers and Received from Vendors

We have various marketing arrangements with retailers and distributors of our products that provide for cooperative advertising and market development funds, among others, which are generally based on single exchange transactions. Such amounts are accrued as a reduction to revenue at the later of: (1) the date at which the related revenue is recognized by us, or (2) the date at which the sales incentive is offered, except for cooperative advertising which is included in selling and marketing expense if there is a separate identifiable benefit and the benefit's fair value can be established.

We receive various incentives from our manufacturers, including up-front cash payments as well as rebates based on a cumulative level of purchases. Such amounts are generally accounted for as a reduction in the price of the manufacturer's product and included as a reduction of inventory or cost of goods sold, based on an agreed upon per unit rebate.

Advertising

We expense advertising costs as incurred. Advertising expense for the fiscal years ended March 31, 2018, 2017 and 2016 amounted to $140,618, $173,947 and $94,743, respectively, and are included in "Selling and marketing expense" in our Consolidated Statements of Operations.

Stock-based Compensation

We have stock-based compensation plans that are broad-based long-term retention programs intended to attract and retain talented employees and align stockholder and employee interests, which allows for awards of restricted stock, restricted stock units and other stock-based awards of our common stock to employees and non-employees. Our plans include time-based, market-based, and performance-based awards of our common stock to employees and non-employees.

We account for stock-based awards under the fair value method of accounting. The fair value of all stock-based compensation is either capitalized and amortized in accordance with our software development cost accounting policy or recognized as expense on a straight-line basis over the full vesting period of the awards for time-based stock awards and on an accelerated attribution method for market-based and performance-based stock awards.

We estimate the fair value of time-based awards to employees using our closing stock price on the date of grant. We estimate the fair value of market-based awards using a Monte Carlo Simulation method, which takes into account assumptions such as the expected volatility of our common stock, the risk-free interest rate based on the contractual term of the award, expected dividend yield, vesting schedule and the probability that the market conditions of the awards will be achieved. For employee performance-based shares, we do not record expense until the performance criteria are considered probable.

We apply variable accounting to our non-employee stock-based awards, whereby we remeasure such awards at each balance sheet date and adjust the value of the awards based on its fair value at the end of the reporting period. For non-employee time-based awards fair value is determined by the closing price of our common stock at the end of the reporting period. For non-employee market-based awards fair value is determined using a Monte Carlo Simulation method, which also takes into account the probability that the market conditions of the awards will be achieved. For non-employee performance-based awards we do not record an expense until performance targets have been achieved and once achieved fair value is determined by the closing price of our common stock at the end of the reporting period.

Stock-based compensation expense is recorded net of forfeitures as they occur.

Earnings (loss) per Share ("EPS")

Basic EPS is computed by dividing the net income (loss) applicable to common stockholders for the period by the weighted average number of shares of common stock outstanding during the same period. Diluted EPS is computed by dividing the net income (loss) applicable to common stockholders for the period by the weighted average number of shares of common stock and common stock equivalents outstanding.

Certain of our unvested stock-based awards are considered participating securities since these securities have non-forfeitable rights to dividends or dividend equivalents during the contractual period of the award, and thus require the two-class method of computing EPS. The calculation of EPS for common stock under the two-class method excludes the income attributable to the participating securities from the numerator and excludes the dilutive effect of those awards from the denominator.

We define common stock equivalents as unvested stock-based awards and common stock underlying the Convertible Notes (see Note 11) outstanding during the period. Common stock equivalents are measured using the treasury stock method, and common stock equivalents underlying the Convertible Notes are assessed for their effect on diluted EPS using the more dilutive of the treasury stock method or the if-converted method. Under the provisions of the if-converted method, the Convertible Notes are assumed to be converted and included in the denominator of the EPS calculation and the interest expense, net of tax, recorded in connection with the Convertible Notes is added back to the numerator. However, potential common shares are not included in the denominator of the diluted earnings (loss) per share calculation when inclusion of such shares would be anti-dilutive, such as in a period in which a net loss is recorded.

Foreign Currency

The functional currency for our foreign operations is primarily the applicable local currency. Accounts of foreign operations are translated into U.S. dollars using exchange rates for assets and liabilities at the balance sheet date and average prevailing exchange rates for the period for revenue and expense accounts. Adjustments resulting from translation are included in accumulated other comprehensive income (loss). Realized and unrealized transaction gains and losses are included in our Consolidated Statements of Operations in the period in which they occur.

Comprehensive Income (Loss)

Comprehensive income (loss) is defined to include all changes in equity except those resulting from investments by owners and distributions to owners. Accumulated other comprehensive income (loss) includes foreign currency translation adjustments, which relate to investments that are permanent in nature and therefore do not require tax adjustments, and the amounts for unrealized gains (losses), net on derivative instruments designated as cash flow hedges, as well as any associated tax impact, and available for sale securities.

Recently Adopted Accounting Pronouncements

Accounting for Stock Compensation

In March 2016, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2016-09, Compensation—Stock Compensation. This new guidance identifies areas for simplification involving several aspects of accounting for share-based payment transactions, including income tax consequences, classification of awards as either equity or liabilities, an option to recognize gross stock compensation expense with actual forfeitures recognized as they occur, as well as certain classifications on the statement of cash flows.

We adopted this update effective April 1, 2017. Upon adoption, using the modified retrospective transition method, we recognized previously unrecognized excess tax benefits as a deferred tax asset, which was fully offset by a valuation allowance, resulting in no net impact to retained earnings. Without the valuation allowance, our deferred tax asset would have increased by $24,594. We elected to apply the change in presentation of excess tax benefits as an operating activity in the Consolidated Statement of Cash Flows prospectively and thus no prior periods were adjusted. We also elected to account for forfeitures as they occur using the modified retrospective transition method, which resulted in a cumulative effect adjustment of $323 to retained earnings (an increase in the accumulated deficit). During the fiscal year ended March 31, 2018, we recognized $53,169 of excess tax benefits on stock-based compensation in our Consolidated Statement of Operations as a result of adopting this update. The other aspects of the new guidance did not have a material effect on our Consolidated Financial Statements.

Accounting for Acquisitions or Disposals

In January 2017, the FASB issued ASU 2017-01, Clarifying the Definition of a Business, with the objective of providing additional guidance to assist entities with evaluating whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses. The amendments in this update provide new guidance to determine when an integrated set of assets and activities (collectively referred to as a “set”) is not a business. The new guidance requires that when substantially all of the fair value of the gross assets acquired (or disposed of) is concentrated in a single identifiable asset or a group of similar identifiable assets, the set is not a business. The new guidance is expected to reduce the number of transactions that need to be further evaluated. The new standard, as amended, will be effective prospectively for interim and annual reporting periods beginning on January 1, 2018 (April 1, 2018 for the Company), with early adoption permitted. We adopted this update as of April 1, 2017.

Recently Issued Accounting Pronouncements

Accounting for Goodwill

In January 2017, the FASB issued ASU 2017-04, Intangibles - Goodwill and Other (Topic 350). This ASU eliminates Step 2 from the goodwill impairment test. Under the new guidance, an entity should perform its annual or interim goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount and recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit’s fair value. Additionally, this ASU eliminates the requirements for any reporting unit with a zero or negative carrying amount to perform a qualitative assessment and, if it fails that qualitative test, to perform Step 2 of the goodwill impairment test. The amendments in this ASU are effective for fiscal years beginning after December 15, 2019 (April 1, 2020 for the Company), including interim periods within those fiscal years, and is applied on a prospective basis. Early adoption is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. While we are currently evaluating the impact of the adoption of this ASU, we do not believe that the adoption of this guidance will have a material impact on our Consolidated Financial Statements.

Accounting for Restricted Cash

In November 2016, the FASB issued ASU 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash. This ASU amends the presentation of restricted cash within the statement of cash flows. The new guidance requires that changes in restricted cash and cash equivalents be included with cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts on the statement of cash flows. This standard will be effective for fiscal years beginning after December 15, 2017 (April 1, 2018 for the Company), including interim periods within those fiscal years. We are currently evaluating the impact of the adoption of this ASU, which will result in a change to our presentation of net cash provided by (used in) operating activities in our Consolidated Statements of Cash Flows for the impact of changes in restricted cash balances.

Accounting for Leases

In February 2016, the FASB issued ASU 2016-02, Leases. This new guidance requires lessees to recognize a right-of-use asset and a lease liability for virtually all leases (other than leases that meet the definition of a short-term lease). The liability will be equal to the present value of lease payments. The asset will be based on the liability, subject to adjustment, such as for initial direct costs. For income statement purposes, the FASB retained a dual model, requiring leases to be classified as either operating or finance. Operating leases will result in straight-line expense (similar to current operating leases) while finance leases will result in a front-loaded expense pattern (similar to current capital leases). Classification will be based on criteria that are largely similar to those applied in current lease accounting. This update is effective for annual periods, and interim periods within those years, beginning after December 15, 2018 (April 1, 2019 for the Company). This new guidance must be adopted using a modified retrospective approach whereby, lessees and lessors are required to recognize and measure leases at the beginning of the earliest period presented using a modified retrospective approach. Early adoption is permitted. We are currently evaluating the impact of adopting this update on our Consolidated Financial Statements, which will consist primarily of a balance sheet gross up of our operating leases, mostly for office space.

Revenue from Contracts with Customers

In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606). Under the new standard, revenue is recognized when a customer obtains control of promised goods or services and is recognized in an amount that reflects the consideration, which the entity expects to receive in exchange for those goods or services. In addition, the standard requires disclosure of the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers.

The new standard is effective for us beginning with the first quarter of fiscal 2019 (April 1, 2018). We are adopting the new standard using the modified retrospective method, which requires the recognition of the cumulative effect upon adoption as an adjustment to retained earnings at the adoption date. We will report our adoption in our Form 10-Q for the first quarter of fiscal 2019.

This standard will have a material impact on our Consolidated Financial Statements. We expect that the most significant impact relates to our accounting for online enabled games that benefit from meaningful online support services and post-release content updates for which we do not have VSOE. Under the current accounting standards, for such titles, we recognize the entire associated revenue ratably over the estimated service period based on the economic game life. Under the new standard, the VSOE requirement will be eliminated, and we will recognize as revenue a portion of the sales price allocated to the software upon delivery of the game. Additionally, we have determined that for purposes of recognizing revenue deferred for both our virtual currency sales and material post-release performance obligations for our online-enabled games, the estimated period during which an average user plays our games (“user life”) most faithfully depicts the timing of our performance. The user life will be calculated on a title-by-title basis and is estimated to be between 9 and 15 months depending on the game. All outstanding deferred revenues and costs as of the date of adoption, April 1, 2018, will be amortized ratably prospectively over the estimated user life for each title.

We expect these differences to affect primarily revenues from our Grand Theft Auto franchise and NBA 2K franchise, where we expect that a majority of the sales price will be allocated to the software and recognized as product revenue upon delivery of the games to our customers, and the remaining amounts allocated to the post-release performance obligation for each title as well as related virtual currency sales will be recognized as service revenue over the user life.

We estimate that the cumulative effect of adopting the new revenue standard will result in an adjustment to retained earnings at the adoption date of approximately $360 million to $440 million, inclusive of the associated tax impacts. Additionally, the new disclosure requirements will require us to design and implement additional internal controls over financial reporting, as well as update certain of our existing processes and internal controls in adopting the new standard.

Also, upon adoption of the new standard, a substantial majority of our allowances, including estimated price protection, reserves for returns and other allowances will be classified as refund liabilities, whereas currently, these allowances are classified as contra-assets within accounts receivable on our Consolidated Balance Sheets.

MANAGEMENT AGREEMENT	12 Months Ended
MANAGEMENT AGREEMENT	Mar. 31, 2018
MANAGEMENT AGREEMENT
MANAGEMENT AGREEMENT	MANAGEMENT AGREEMENT In March 2014, we entered into an amended management services agreement, (the "2014 Management Agreement") with ZelnickMedia Corporation ("ZelnickMedia") pursuant to which ZelnickMedia provided us with certain management, consulting and executive level services. In November 2017, we entered into a new management agreement, (the "2017 Management Agreement"), with ZelnickMedia pursuant to which ZelnickMedia continues to provide financial and management consulting services to the Company through March 31, 2024. The 2017 Management Agreement became effective January 1, 2018 and supersedes and replaces the 2014 Management Agreement, except as otherwise contemplated by the 2017 Management Agreement. As part of the 2017 Management Agreement, Strauss Zelnick, the President of ZelnickMedia, continues to serve as Executive Chairman and Chief Executive Officer and Karl Slatoff, a partner of ZelnickMedia, continues to serve as President of the Company. The 2014 Management Agreement provided for an annual management fee of $2,970 over the term of the agreement and a maximum annual bonus opportunity of $4,752 over the term of the agreement, based on the Company achieving certain performance thresholds. The 2017 Management Agreement provides for an annual management fee of $3,100 over the term of the agreement and a maximum annual bonus opportunity of $7,440 over the term of the agreement, based on the Company achieving certain performance thresholds. In consideration for ZelnickMedia's services, we recorded consulting expense (a component of general and administrative expenses) of $8,426, $7,722 and $7,722 for the fiscal years ended March 31, 2018, 2017 and 2016, respectively. Pursuant to the 2014 Management Agreement, we also issued stock-based awards to ZelnickMedia. During the fiscal years ended March 31, 2018, 2017 and 2016, we recorded $32,801, $29,573 and $26,652, respectively, of stock-based compensation expense for non-employee awards, which is included in general and administrative expenses. See Note 15 for a discussion of such awards.

FAIR VALUE MEASUREMENTS

12 Months Ended

Mar. 31, 2018

Fair Value Disclosures [Abstract]

FAIR VALUE MEASUREMENTS

The carrying amounts of our financial instruments, including cash and cash equivalents, restricted cash, accounts receivable, accounts payable and accrued liabilities, approximate fair value because of their short maturities.

We follow a three-level fair value hierarchy that prioritizes the inputs used to measure fair value. This hierarchy requires entities to maximize the use of "observable inputs" and minimize the use of "unobservable inputs." The three levels of inputs used to measure fair value are as follows:


•	Level 1—Quoted prices in active markets for identical assets or liabilities.


•	Level 2—Observable inputs other than quoted prices included in Level 1, such as quoted prices for markets that are not active or other inputs that are observable or can be corroborated by observable market data.


•	Level 3—Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. This includes certain pricing models, discounted cash flow methodologies and similar techniques that use significant unobservable inputs.

The table below segregates all assets that are measured at fair value on a recurring basis (which is measured at least annually) into the most appropriate level within the fair value hierarchy based on the inputs used to determine the fair value at the measurement date.



	March 31, 2018			Quoted prices in active markets for identical assets (level 1)		Significant other observable inputs (level 2)			Significant unobservable inputs (level 3)		Balance Sheet Classification
Money market funds	$	516,626		$	516,626	$	—		$	—	Cash and cash equivalents
Bank-time deposits	21			21		—			—		Cash and cash equivalents
Commercial paper	10,796			—		10,796			—		Cash and cash equivalents
Corporate bonds	308,716			—		308,716			—		Short-term investments
US Treasuries	59,725			59,725		—			—		Short-term investments
Commercial paper	25,422			—		25,422			—		Short-term investments
Mutual funds	4,880			—		4,880			—		Short-term investments
Bank-time deposits	216,663			216,663		—			—		Short-term investments
Foreign currency forward contracts	12			—		12			—		Prepaid expenses and other
Foreign currency forward contracts	(43		)	—		(43		)	—		Accrued and other current liabilities
Cross-currency swap	(15,659		)	—		(15,659		)	—		Accrued and other current liabilities
Private equity	1,205			—		—			1,205		Other assets
Total recurring fair value measurements, net	$	1,128,364		$	793,035	$	334,124		$	1,205



	March 31, 2017			Quoted prices in active markets for identical assets (level 1)		Significant other observable inputs (level 2)			Significant unobservable inputs (level 3)			Balance Sheet Classification
Money market funds	$	646,386		$	646,386	$	—		$	—		Cash and cash equivalents
Bank-time deposits	46,605			46,605		—			—			Cash and cash equivalents
Commercial paper	38,268			—		38,268			—			Cash and cash equivalents
Corporate bonds	243,019			—		243,019			—			Short-term investments
Bank-time deposits	175,745			175,745		—			—			Short-term investments
Commercial paper	25,936			—		25,936			—			Short-term investments
Mutual funds	4,232			—		4,232			—			Short-term investments
Foreign currency forward contracts	2			—		2			—			Prepaid expenses and other
Foreign currency forward contracts	(352		)	—		(352		)	—			Accrued and other current liabilities
Private equity	570			—		—			570			Other assets
Contingent consideration	(6,465		)	—		—			(6,465		)	Other long-term liabilities
Total recurring fair value measurements, net	$	1,173,946		$	868,736	$	311,105		$	(5,895	)

In connection with the Social Point acquisition (see Note 23), we recorded $6,409 as the initial fair value of earn-out contingent consideration. The fair value was estimated using a Monte-Carlo simulation model, which included significant unobservable Level 3 inputs, such as projected financial performance over the earn-out period along with estimates for market volatility and the discount rate applicable to potential cash payouts.

During the fiscal year ended March 31, 2018, we recognized a reduction to general and administrative expense of $6,465, after the impact of foreign exchange, for the decrease in fair value of the contingent consideration liability associated with the Social Point acquisition, which reduced the fair value of the contingent consideration liability to $0. The reduction resulted from the lower probability of Social Point achieving certain performance measures in the 24-month period following the acquisition.

We did not have any transfers between Level 1 and Level 2 fair value measurements nor did we have any transfers into or out of Level 3 during the fiscal year ended March 31, 2018.

Debt

As of March 31, 2018, the estimated fair value of our 1.00% Convertible Notes due 2018 (the "1.00% Convertible Notes") was $36,799. The fair value was determined using Level 2 inputs, observable market data for the 1.00% Convertible Notes and its embedded option feature. See Note 11 for additional information regarding our Convertible Notes.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

SHORT-TERM INVESTMENTS

12 Months Ended

Mar. 31, 2018

Investments, Debt and Equity Securities [Abstract]

SHORT TERM INVESTMENTS

SHORT-TERM INVESTMENTS

Our short-term investments consisted of the following as of March 31, 2018:



	March 31, 2018
	Cost or Amortized Cost		Gross Unrealized
	Cost or Amortized Cost		Gains		Losses			Fair Value
Short-term investments
Bank time deposits	$	216,663	$	—	$	—		$	216,663
Available-for-sale securities:
Corporate bonds	310,387		16		(1,687		)	308,716
US Treasuries	59,970		—		(245		)	59,725
Commercial paper	25,422		—		—			25,422
Mutual funds	4,876		16		(12		)	4,880
Total short-term investments	$	617,318	$	32	$	(1,944	)	$	615,406



	March 31, 2017
	Cost or Amortized Cost		Gross Unrealized
	Cost or Amortized Cost		Gains		Losses			Fair Value
Short-term investments
Bank time deposits	$	175,745	$	—	$	—		$	175,745
Available-for-sale securities:
Corporate bonds	243,140		98		(219		)	243,019
Commercial paper	25,938		5		(7		)	25,936
Mutual funds	4,118		123		(9		)	4,232
Total short-term investments	$	448,941	$	226	$	(235	)	$	448,932

Based on our evaluation of impairment for these investments, we did not consider any of these investments to be other-than-temporarily impaired as of March 31, 2018 or 2017. We do not intend to sell any of our investments with unrealized losses, nor is it more likely than not that we will be required to sell those investments.

The following table summarizes the contracted maturities of our short-term investments at March 31, 2018:



	March 31, 2018
	Amortized Cost		Fair Value
Short-term investments
Due in 1 year or less	$	509,981	$	508,853
Due in 1-2 years	107,337		106,553
Total short-term investments	$	617,318	$	615,406

- Definition

The entire disclosure for investments in certain debt and equity securities.

+ References + Details

DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES

12 Months Ended

Mar. 31, 2018

Derivative Instruments and Hedging Activities Disclosure [Abstract]

DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES

Our risk management strategy includes the use of derivative financial instruments to reduce the volatility of earnings and cash flows associated with changes in foreign currency exchange rates. We do not enter into derivative financial contracts for speculative or trading purposes. We classify cash flows from its derivative transactions as cash flows from operating activities in our Consolidated Statements of Cash Flows.

Foreign currency forward contracts

The following table shows the gross notional amounts of foreign currency forward contracts:



	March 31,
	2018		2017
Forward contracts to sell foreign currencies	$	67,580	$	177,549
Forward contracts to purchase foreign currencies	$	4,359	$	9,170

For the fiscal years ended March 31, 2018, 2017 and 2016, we recorded a loss of $19,473 and gains of $7,197, and $144, respectively, related to foreign currency forward contracts in Interest and other, net on the Consolidated Statements of Operations. Our derivative contracts are foreign currency exchange forward contracts that are not designated as hedging instruments under hedge accounting and are used to reduce the impact of foreign currency on certain balance sheet exposures and certain revenue and expense. These instruments are generally short term in nature, with typical maturities of less than one year, and are subject to fluctuations in foreign exchange rates.

Cross-currency swaps

We entered into a cross-currency swap agreement in August 2017 related to an intercompany loan that has been designated and accounted for as a cash flow hedge of foreign currency exchange risk. The intercompany loan is related to the acquisition of Social Point. As of March 31, 2018, the notional amount of the cross-currency swap is $129,000. This cross-currency swap mitigates the exposure to fluctuations in the U.S. dollar-euro exchange rate related to the intercompany loan. The critical terms of the cross-currency swap agreement correspond to the intercompany loan and both mature at the same time in 2027; as such, there was no ineffectiveness during the period.

Changes in the fair value of this cross-currency swap are recorded in Accumulated other comprehensive income (loss) and offset the change in value of interest and principal payment as a result of changes in foreign exchange rates. Resulting gains or losses from the cross-currency swap are reclassified from Accumulated other comprehensive income (loss) to earnings to offset foreign currency transaction gains and losses recognized on the intercompany loan. We recognize the difference between the U.S. dollar interest payments received from the swap counterparty and the U.S. dollar equivalent of the euro interest payments made to the swap counterparty in Interest and other, net on our Consolidated Statement of Operations. There are no credit-risk related contingent features associated with these swaps.

- Definition

The entire disclosure for derivative instruments and hedging activities including, but not limited to, risk management strategies, non-hedging derivative instruments, assets, liabilities, revenue and expenses, and methodologies and assumptions used in determining the amounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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+ Details

INVENTORY

12 Months Ended

Mar. 31, 2018

Inventory Disclosure [Abstract]

INVENTORY

Inventory balances by category are as follows:



	March 31,
	2018		2017
Finished products	$	13,940	$	15,530
Parts and supplies	1,222		793
Inventory	$	15,162	$	16,323

Estimated product returns included in inventory at March 31, 2018 and 2017 were $373 and $529, respectively.

SOFTWARE DEVELOPMENT COSTS AND LICENSES

12 Months Ended

Mar. 31, 2018

SOFTWARE DEVELOPMENT COSTS AND LICENSES

SOFTWARE DEVELOPMENT COSTS AND LICENSES

Details of our capitalized software development costs and licenses are as follows:



	March 31,
	2018				2017
	Current		Non-current		Current		Non-current
Software development costs, internally developed	$	19,338	$	515,761	$	28,959	$	310,229
Software development costs, externally developed	4,275		122,270		5,455		71,407
Licenses	9,671		1,338		7,307		274
Software development costs and licenses	$	33,284	$	639,369	$	41,721	$	381,910

Software development costs and licenses as of March 31, 2018 and 2017 included $638,055 and $381,910, respectively, related to titles that have not been released.

Amortization and impairment of software development costs and licenses are as follows:



	Fiscal Year Ended March 31,
	2018			2017			2016
Amortization of software development costs and licenses	$	101,437		$	222,801		$	117,506
Impairment of software development costs and licenses	1,060			20,166			22,671
Less: Portion representing stock-based compensation	(24,610		)	(21,056		)	(5,705		)
Amortization and impairment, net of stock-based compensation	$	77,887		$	221,911		$	134,472

FIXED ASSETS, NET

12 Months Ended

Mar. 31, 2018

Property, Plant and Equipment [Abstract]

FIXED ASSETS, NET

Fixed asset balances by category are as follows:



	March 31,
	2018			2017
Computer equipment	$	87,926		$	75,281
Computer software	47,702			41,527
Leasehold improvements	88,762			56,758
Office equipment	8,139			5,843
Furniture and fixtures	13,933			9,108
	246,462			188,517
Less: accumulated depreciation	(143,984		)	(121,217		)
Fixed assets, net	$	102,478		$	67,300

Depreciation expense related to fixed assets for the fiscal years ended March 31, 2018, 2017 and 2016 was $32,202, $30,629 and $28,800, respectively.

GOODWILL AND INTANGIBLE ASSETS, NET

12 Months Ended

Mar. 31, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

GOODWILL AND INTANGIBLE ASSETS, NET

Goodwill

The change in our goodwill balance is as follows:



	Total
Balance at March 31, 2016	$	217,080
Additions and adjustments (see Note 23)	143,952
Currency translation adjustment	(1,917		)
Balance at March 31, 2017	$	359,115
Additions from immaterial acquisition	6,236
Adjustments (see Note 23)	4,245
Currency translation adjustment	$	29,934
Balance at March 31, 2018	$	399,530

Indefinite-lived intangibles

Intangibles, net as of March 31, 2017 includes in-process research and development assets of $14,827 acquired as part of the Social Point acquisition, which are indefinite-lived intangibles and therefore not subject to amortization until the related games are released. During the fiscal year ended March 31, 2018, as a result of our decision not to proceed with further development of a certain game related to in-process research and development ("IPR&D"), we recognized an impairment charge of $11,257 in Depreciation and amortization expense in our Consolidated Statements of Operations. As of March 31, 2018, there are $5,226 of in-process research and development assets included in Intangibles, net.

Definite-lived intangibles

The following table sets forth the intangible assets that are subject to amortization:



	March 31,
	2018							2017
	Gross Carrying Amount		Accumulated Amortization			Net Book Value		Gross Carrying Amount		Accumulated Amortization			Net Book Value
Intellectual property	$	37,431	$	(13,616	)	$	23,815	$	15,931	$	(12,943	)	$	2,988
Developed game technology	67,133		(23,189		)	43,944		54,421		(2,659		)	51,762
Analytics technology	34,499		(8,050		)	26,449		29,959		(999		)	28,960
User base	10,454		(10,454		)	—		9,079		(1,513		)	7,566
Branding and trade names	4,879		(632		)	4,247		4,237		(78		)	4,159
Total definite-lived intangible assets	$	154,396	$	(55,941	)	$	98,455	$	113,627	$	(18,192	)	$	95,435

During the fiscal year ended March 31, 2018, we acquired intellectual property related to Kerbal Space Program, which was treated as a an asset acquisition in accordance with the adoption of ASU 2017-01 (Refer to Note 1), resulting in a $21,500 increase in Intellectual property and a $4,465 increase in Developed game technology.

Amortization of intangible assets is included in our Consolidated Statements of Operations as follows:



	Fiscal Year Ended March 31,
	2018		2017		2016
Cost of goods sold	$	19,719	$	4,252	$	160
Selling and marketing	8,107		1,497		—
Research and development	6,494		989		—
Depreciation and amortization	510		78		—
Total amortization of intangible assets	$	34,830	$	6,816	$	160

Estimated future amortization of intangible assets that will be recorded in cost of goods sold and operating expenses for the years ending March 31, are as follows:



Fiscal Year Ended March 31,	Amortization
2019	$	31,683
2020	28,223
2021	18,445
2022	10,774
2023	4,295

- Definition

The entire disclosure for the aggregate amount of goodwill and a description of intangible assets, which may include (a) for amortizable intangible assets (also referred to as finite-lived intangible assets), the carrying amount, the amount of any significant residual value, and the weighted-average amortization period, (b) for intangible assets not subject to amortization (also referred to as indefinite-lived intangible assets), the carrying amount, and (c) the amount of research and development assets acquired and written off in the period, including the line item in the income statement in which the amounts written off are aggregated, if not readily apparent from the income statement. Also discloses (a) for amortizable intangibles assets in total and by major class, the gross carrying amount and accumulated amortization, the total amortization expense for the period, and the estimated aggregate amortization expense for each of the five succeeding fiscal years, (b) for intangible assets not subject to amortization the carrying amount in total and by major class, and (c) for goodwill, in total and for each reportable segment, the changes in the carrying amount of goodwill during the period (including the aggregate amount of goodwill acquired, the aggregate amount of impairment losses recognized, and the amount of goodwill included in the gain (loss) on disposal of a reporting unit). If any part of goodwill has not been allocated to a reportable segment, discloses the unallocated amount and the reasons for not allocating. For each impairment loss recognized related to an intangible asset (excluding goodwill), discloses: (a) a description of the impaired intangible asset and the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method for determining fair value, (c) the caption in the income statement or the statement of activities in which the impairment loss is aggregated, and (d) the segment in which the impaired intangible asset is reported. For each goodwill impairment loss recognized, discloses: (a) a description of the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method of determining the fair value of the associated reporting unit, and (c) if a recognized impairment loss is an estimate not finalized and the reasons why the estimate is not final. May also disclose the nature and amount of any significant adjustments made to a previous estimate of an impairment loss.

+ References + Details

ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES

12 Months Ended

Mar. 31, 2018

Liabilities, Current [Abstract]

ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES

Accrued expenses and other current liabilities consisted of:



	March 31,
	2018		2017
Software development royalties	$	600,512	$	492,133
Business reorganization (see Note 20)	72,074		65,935
Compensation and benefits	57,499		44,843
Licenses	43,261		37,019
Deferred acquisition payments	25,000		25,000
Marketing and promotions	19,731		21,030
Other	96,671		64,915
Accrued expenses and other current liabilities	$	914,748	$	750,875

DEBT

12 Months Ended

Mar. 31, 2018

Debt Disclosure [Abstract]

DEBT

Credit Agreement

In December 2017, we entered into a Seventh Amendment to our Second Amended and Restated Credit Agreement (as amended, the “Credit Agreement”). The Credit Agreement provides for borrowings of up to $100,000 which may be increased by up to $100,000 pursuant to the terms of the Credit Agreement and which is secured by substantially all of our assets and the equity of our subsidiaries. The Credit Agreement expires on August 18, 2019. Revolving loans under the Credit Agreement bear interest at our election of (a) 0.25% to 0.75% above a certain base rate (4.75% at March 31, 2018), or (b) 1.25% to 1.75% above the LIBOR Rate (approximately 1.88% at March 31, 2018), with the margin rate subject to the achievement of certain average liquidity levels. We are also required to pay a monthly fee on the unused available balance, ranging from 0.25% to 0.375% based on availability. We had no outstanding borrowings at March 31, 2018 and 2017.

Availability under the Credit Agreement is unrestricted when liquidity, as defined in the Credit Agreement, is at least $300,000. When liquidity is below $300,000 availability under the Credit Agreement is restricted by our United States and United Kingdom based accounts receivable and inventory balances. The Credit Agreement also allows for the issuance of letters of credit in an aggregate amount of up to $5,000.

Information related to availability on our Credit Agreement is as follows:



	March 31,
	2018		2017
Available borrowings	$	98,335	$	98,320
Outstanding letters of credit	$	1,664	$	1,664

We recorded interest expense and fees related to the Credit Agreement of $441, $441 and $438, for the fiscal years ended March 31, 2018, 2017 and 2016, respectively. The Credit Agreement contains covenants that substantially limit our and our subsidiaries' ability to: create, incur, assume or be liable for indebtedness; dispose of assets outside the ordinary course of business; acquire, merge or consolidate with or into another person or entity; create, incur or allow any lien on any of their respective properties; make investments; or pay dividends or make distributions (each subject to certain limitations); or optionally prepay any indebtedness (subject to certain exceptions, including an exception permitting the redemption of the Company's unsecured convertible senior notes upon the meeting of certain minimum liquidity requirements). In addition, the Credit Agreement provides for certain events of default such as nonpayment of principal and interest, breaches of representations and warranties, noncompliance with covenants, acts of insolvency, default on indebtedness held by third parties and default on certain material contracts (subject to certain limitations and cure periods). The Credit Agreement also contains a requirement that we maintain an interest coverage ratio of more than one to one for the trailing twelve-month period, if certain average liquidity levels fall below $30,000.

Convertible Notes Due 2018

On June 18, 2013, we issued $250,000 aggregate principal amount of 1.00% Convertible Notes due 2018. The 1.00% Convertible Notes were issued at 98.5% of par value for proceeds of $246,250. Interest on the 1.00% Convertible Notes is payable semi-annually in arrears on July 1st and January 1st of each year, commencing on January 1, 2014. The 1.00% Convertible Notes mature on July 1, 2018, unless earlier repurchased by the Company or converted. The Company does not have the right to redeem the 1.00% Convertible Notes prior to maturity. The Company also granted the underwriters a 30-day option to purchase up to an additional $37,500 principal amount of 1.00% Convertible Notes to cover overallotments, if any. On July 17, 2013, the Company closed its public offering of $37,500 principal amount of the Company's 1.00% Convertible Notes as a result of the underwriters exercising their overallotment option in full on July 12, 2013, bringing the total proceeds to $283,188.

The 1.00% Convertible Notes are convertible at an initial conversion rate of 46.4727 shares of our common stock per $1 principal amount of 1.00% Convertible Notes (representing an initial conversion price of approximately $21.52 per share of common stock for a total of approximately 13,361 underlying conversion shares) subject to adjustment in certain circumstances.

During the fiscal year ended March 31, 2018, 1.00% Convertible Notes with an aggregate principal value of $259,989 were submitted for conversion. We elected to settle the conversion in shares of our common stock. As a result of early conversions of the 1.00% Convertible Notes, we recorded a gain within Interest and other, net on our Consolidated Statement of Operations of $4,900 for the fiscal year ended March 31, 2018.

The following table provides additional information related to our 1.00% Convertible Notes:



	March 31,
	2018		2017
Additional paid-in capital	$	35,784	$	35,784
Principal amount of 1.00% Convertible Notes	$	8,160	$	268,149
Unamortized discount of the liability component	89		15,751
Carrying amount of debt issuance costs	3		469
Net carrying amount of 1.00% Convertible Notes	$	8,068	$	251,929

As of March 31, 2018 and 2017, the if-converted value of our 1.00% Convertible Notes exceeded the principal amount of $8,160 and $268,149, respectively, by $28,639 and $470,456, respectively.

As of April 1, 2018 until the close of business on the business day immediately preceding the maturity date, holders may convert their 1.00% Convertible Notes at any time. Prior to April 26, 2018, upon conversion, the 1.00% Convertible Notes were eligible to be settled, at our election, in cash, shares of our common stock, or a combination of cash and shares of our common stock. Effective April 26, 2018, we elected to settle our remaining conversion obligations in connection with the 1.00% Convertible Notes solely in shares of our common stock and accordingly notified the Trustee. As such, we have continued to classify these 1.00% Convertible Notes as long-term debt.

The following table provides the components of interest expense related to our 1.00% Convertible Notes:



	Fiscal Year Ended March 31,
	2018		2017		2016
Cash interest expense (coupon interest expense)	$	539	$	2,784	$	2,875
Non-cash amortization of discount on 1.00% Convertible Notes	15,662		14,221		12,085
Amortization of debt issuance costs	466		453		443
Total interest expense related to 1.00% Convertible Notes	$	16,667	$	17,458	$	15,403

EARNINGS (LOSS) PER SHARE ("EPS")

12 Months Ended

Mar. 31, 2018

Earnings Per Share [Abstract]

EARNINGS (LOSS) PER SHARE (EPS)

EARNINGS (LOSS) PER SHARE ("EPS")

The following table sets forth the computation of basic and diluted EPS (in thousands except per share amounts):



	Fiscal Year Ended March 31,
	2018				2017			2016
Computation of Basic earnings (loss) per share:
Net income (loss)	$	173,533			$	67,303		$	(8,302	)
Less: net income allocated to participating securities	(159		)		(1,275		)	—
Net income (loss) for basic earnings (loss) per share calculation	$	173,374			$	66,028		$	(8,302	)
Total weighted average shares outstanding—basic	110,210				91,921			83,417
Less: weighted average participating shares outstanding	(101		)		(1,741		)	—
Weighted average common shares outstanding—basic	110,109				90,180			83,417
Basic earnings (loss) per share	$	1.57			$	0.73		$	(0.10	)
Computation of Diluted earnings (loss) per share:
Net income (loss)	$	173,533			$	67,303		$	(8,302	)
Less: net income allocated to participating securities	(155		)		(1,246		)	—
Net income (loss) for diluted earnings (loss) per share calculation	$	173,378			$	66,057		$	(8,302	)
Weighted average common shares outstanding—basic	110,109				91,921			83,417
Add: dilutive effect of common stock equivalents	2,755			2,755	2,152			—
Weighted average common shares outstanding—diluted	112,864				94,073			83,417
Less: weighted average participating shares outstanding	(101		)		(1,741		)	—
Weighted average common shares outstanding- diluted	112,763				92,332			83,417
Diluted earnings (loss) per share	$	1.54			$	0.72		$	(0.10	)

The calculation of EPS for common stock under the two-class method shown above for the fiscal years ended March 31, 2018 and 2017 excludes income attributable to the participating securities from the numerator and excludes the dilutive effect of those awards from the denominator.

We incurred a net loss for the fiscal year ended March 31, 2016; therefore, the basic and diluted weighted average shares outstanding excluded the effect of unvested share-based awards that are considered participating securities and all common stock equivalents because their effect would be antidilutive. For the fiscal year ended March 31, 2016 we had 6,405 of unvested share-based awards which were excluded due to the net loss for the period.

COMMITMENTS AND CONTINGENCIES

12 Months Ended

Mar. 31, 2018

Commitments and Contingencies Disclosure [Abstract]

COMMITMENTS AND CONTINGENCIES

A summary of annual minimum contractual obligations and commitments as of March 31, 2018 is as follows:



Fiscal Year Ending March 31,	Software Development and Licensing		Marketing		Operating Leases		Purchase Obligations		Convertible Notes Interest		Convertible Notes		Total
2019	$	116,242	$	49,725	$	39,113	$	21,549	$	20	$	8,160	$	234,809
2020	53,534		4,060		29,620		7,046		—		—		94,260
2021	28,999		13,480		23,092		1,629		—		—		67,200
2022	21,748		3,773		21,665		—		—		—		47,186
2023	6,250		3,500		19,571		—		—		—		29,321
Thereafter	5,250		—		62,476		—		—		—		67,726
Total	$	232,023	$	74,538	$	195,537	$	30,224	$	20	$	8,160	$	540,502

Software Development and Licensing Agreements: We make payments to third-party software developers that include contractual payments to developers under several software development agreements that expire at various times through January 2022. Our aggregate outstanding software development commitments assume satisfactory performance by third-party software developers. We also have licensing commitments that primarily consist of obligations to holders of intellectual property rights for use of their trademarks, copyrights, technology or other intellectual property rights in the development of our products.

Marketing Agreements: We have certain minimum marketing support commitments where we commit to spend specified amounts related to marketing our products. Marketing commitments expire at various times through December 2022 and primarily reflect our agreements with major sports leagues and players' associations.

Operating Leases: Our offices are occupied under non-cancelable operating leases expiring at various times through December 2032. We also lease certain furniture, equipment and automobiles under non-cancelable leases expiring through March 2021. Some of the leases have fixed rent increases and also include inducements to enter into the lease. The effect of such amounts are deferred and recognized on a straight-line basis over the related lease term. Rent expense amounted to $25,301, $19,545 and $18,032 for the fiscal years ended March 31, 2018, 2017 and 2016, respectively.

Purchase obligations: These obligations are primarily related to agreements to purchase services that are enforceable and legally binding on the Company that specifies all significant terms, including fixed, minimum or variable pricing provisions; and the approximate timing of the transactions, expiring at various times through September 2021.

Employee Savings Plans: For our United States employees we maintain a 401(k) retirement savings plan and trust. Our 401(k) plan is offered to all eligible employees and participants may make voluntary contributions. We also have various pension plans for our non-U.S. employees, some of which are required by local laws, and allow or require Company contributions. Employer contributions under all defined contribution and pension plans during the fiscal years ended March 31, 2018, 2017 and 2016 were $9,592, $8,018 and $8,348, respectively.

Legal and Other Proceedings: We are, or may become, subject to demands and claims (including intellectual property claims) and are involved in routine litigation in the ordinary course of business which we do not believe to be material to our business or financial condition or results of operations. We have appropriately accrued amounts related to certain of these claims and legal and other proceedings. While it is reasonably possible that a loss may be incurred in excess of the amounts accrued in our financial statements, we believe that such losses, unless otherwise disclosed, would not be material.

On April 11, 2016, we filed a declaratory judgment action in the United States District Court for the Southern District of New York seeking, among other things, a judicial declaration that Leslie Benzies, the former president of one of our subsidiaries with whom we had been in ongoing discussions regarding his separation of employment, is not entitled to any minimum allocation or financial parity with any other person under the applicable royalty plan. We believe we will prevail in this matter, although there can be no assurance of the outcome. On April 12, 2016, Mr. Benzies filed a complaint in the Supreme Court of the State of New York, New York County against us, and certain of our subsidiaries and employees. We removed this case to the United States District Court for the Southern District of New York, but the case was subsequently remanded to state court. The complaint claims damages of at least $150,000 and contains allegations of breach of fiduciary duty; fraudulent inducement and fraudulent concealment; aiding and abetting breach of fiduciary duty; breach of various contracts; breach of implied duty of good faith and fair dealing; tortious interference with contract; unjust enrichment; reformation; constructive trust; declaration of rights; constructive discharge; defamation and fraud. We have asserted counterclaims for breach of contract, theft of trade secrets, and misappropriation.

As a result of amended pleadings, motion practice and appeals to date, twelve of Mr. Benzies’ claims have been dismissed, leaving only six remaining claims: breach of various contracts, constructive discharge, breach of implied duty of good faith and fair dealing, and tortious interference with contract. Our federal court action has been stayed pending the conclusion of the state court action. We believe that we have meritorious defenses to the remaining claims, and we intend to vigorously defend against them and to pursue our counterclaims.

We have accrued what we believe to be an adequate amount for this matter, which amounts are classified as Business reorganization within Accrued expenses and other current liabilities in our Consolidated Balance Sheets (see Note 20 - Business Reorganization). We do not believe that the ultimate outcome of such litigation, even if in excess of our current accrual, will have a material adverse effect on our business, financial condition or results of operations.

INCOME TAXES

12 Months Ended

Mar. 31, 2018

Income Tax Disclosure [Abstract]

INCOME TAXES

On December 22, 2017, the U.S. enacted comprehensive tax legislation commonly referred to as the Tax Cuts and Jobs Act (herein referred to as the "Act”). The Act makes broad and complex changes to the U.S. tax code that could materially affect us. The Act reduces the U.S. federal corporate income tax rate from 35% to 21%, effective January 1, 2018 and requires companies to pay a one-time transition tax on the previously untaxed earnings of certain foreign subsidiaries. In addition, the Act makes other changes that may affect us, beginning April 1, 2018. These changes include but are not limited to (1) a Base Erosion Anti-abuse Tax (BEAT), which is a new minimum tax, (2) generally eliminating U.S. federal income taxes on dividends from foreign subsidiaries, (3) a new provision that taxes global intangible low-taxed income (GILTI), (4) the repeal of the domestic production activity deduction, and (5) other base broadening provisions.

We recorded an estimated increase to income tax expense of $18,078 related to the one-time transition tax on the previously untaxed earnings of certain foreign subsidiaries as a result of the Act. The estimated increase was a result of a transition tax of $26,649, offset by an increased benefit from domestic production deductions and tax credits. In addition, as a result of the decrease in the U.S. federal corporate income tax rate from 35% to 21%, we recorded a decrease to net deferred tax assets of $47,677, and corresponding decrease to valuation allowance of $39,769 after taking into account a portion of the deferred tax liability from indefinite lived intangibles as a source of income against deferred tax assets, resulting in a tax benefit of $7,908. The re-measurement of the deferred tax liability relating to indefinite lived intangibles, due to the rate change, resulted in a tax benefit of $6,202.

We are currently evaluating the potential impact of the Act, and the amounts recorded represent provisional estimates for certain identified income tax effects for which the accounting is incomplete but a reasonable estimate can be determined, in accordance with Staff Accounting Bulletin No. 118 (SAB 118). Further analysis is required to review historical practices used to calculate the untaxed earnings of certain foreign subsidiaries and additional time to evaluate the complexities of the new tax law along with additional interpretative guidance that may be issued. The impact of the Act may differ from these estimates, possibly materially, due to changes in interpretations and assumptions we have made, guidance that may be issued, and actions we may take as a result of the Act. We expect to continue to analyze the Act and its impact and expect to record any adjustments to provisional estimates no later than the third quarter of fiscal 2019.

Components of income (loss) before income taxes are as follows:



	Fiscal Year Ended March 31,
	2018		2017			2016
Domestic	$	136,239	$	86,050		$	(94,174	)
Foreign	386		(9,085		)	55,824
Income (loss) before income taxes	$	136,625	$	76,965		$	(38,350	)

Provision (benefit from) for current and deferred income taxes consists of the following:



	Fiscal Year Ended March 31,
	2018			2017			2016
Current:
U.S. federal	$	(7,327	)	$	19,271		$	792
U.S. state and local	(1,266		)	2,521			938
Foreign	4,208			(13,012		)	(31,508		)
Total current income taxes	(4,385		)	8,780			(29,778		)
Deferred:
U.S. federal	(13,530		)	969			1,211
U.S. state and local	195			2,395			(231		)
Foreign	(19,188		)	(2,482		)	(1,250		)
Total deferred income taxes	(32,523		)	882			(270		)
Provision (benefit from) for income taxes	$	(36,908	)	$	9,662		$	(30,048	)

A reconciliation of our effective tax rate to the U.S. statutory federal income tax rate is as follows:



	Fiscal Year Ended March 31,
	2018		2017		2016
U.S. federal statutory rate	31.6	%	35.0	%	35.0	%
State and local taxes, net of U.S. federal benefit	0.5	%	4.9	%	1.6	%
Foreign tax rate differential⁽¹⁾	(6.9	)%	(1.4	)%	25.8	%
Foreign earnings	1.2	%	5.5	%	(3.7	)%
Tax credits ⁽²⁾	(16.5	)%	(45.8	)%	98.7	%
Excess tax benefits from stock-based compensation ⁽³⁾	(38.9	)%	—		—
One-time transition tax⁽⁴⁾	19.5	%	—		—
Domestic production deduction	(2.8	)%	(2.5	)%	—
Valuation allowance—domestic⁽⁵⁾	(0.5	)%	10.1	%	(77.8	)%
Valuation allowance—foreign	(2.5	)%	0.1	%	10.4	%
Change in reserves	(11.0	)%	2.9	%	(7.0	)%
Other	(0.7	)%	3.7	%	(4.6	)%
Effective tax rate	(27.0	)%	12.5	%	78.4	%

(1) The foreign rate differential in relation to foreign earnings, for all periods presented, are primarily driven by changes in the mix of our foreign earnings and the difference in the foreign versus U.S. income tax rate.

(2) Tax benefits were recorded for fiscal years ended March 31, 2018, 2017, and 2016 attributable to certain tax credits related to software development activities.

(3) The accounting for share-based compensation will increase or decrease our effective tax rate based upon the difference between our share-based compensation expense and the deductions taken on our tax return, which depends upon the stock price at the time of employee award vesting

(4) Represents provisional estimate in accordance with SAB 118, relating to one-time transition tax on previously untaxed earnings of certain foreign subsidiaries per the Act.

(5) The change in domestic valuation allowance includes tax benefits recognized as a result of the Act from indefinite lived intangibles.

The effects of temporary differences that gave rise to our deferred tax assets and liabilities were as follows:



	March 31,
	2018			2017
Deferred tax assets:
Accrued compensation expense	$	94,919		$	131,305
Equity-based compensation	78,293			25,048
Deferred revenue	42,426			41,977
Net operating loss carryforward	35,378			20,131
Tax credit carryforward	64,175			52,639
Business reorganization	16,369			24,103
Sales returns and allowances (including bad debt)	575			3,942
Deferred rent	5,729			8,865
Other	1,145			4,045
Total deferred tax assets	339,009			312,055
Less: Valuation allowance	(195,640		)	(184,085		)
Net deferred tax assets	143,369			127,970
Deferred tax liabilities:
Capitalized software and depreciation	(118,119		)	(120,715		)
Convertible debt	(13		)	(5,219		)
Intangible amortization	(24,651		)	(38,068		)
Other	(4,534		)	—
Total deferred tax liabilities	(147,317		)	(164,002		)
Net deferred tax liability⁽¹⁾	(3,948		)	(36,032		)

(1) As of March 31, 2018 and 2017, $3,948 and $36,032, respectively, is included in Other long-term liabilities.

The valuation allowance is primarily attributable to deferred tax assets for which no benefit is provided due to uncertainty with respect to their realization. The net deferred tax liability is primarily the result of deferred tax liabilities related to indefinite lived intangibles, which cannot be used to offset deferred tax assets, as well as deferred tax liabilities related to intangibles as a result of the acquisition of Social Point.

At March 31, 2018, we had domestic net operating loss carryforwards totaling $50,136 of which $1,676 will expire in 2022, $21,700 will expire from 2023 to 2027, $22,400 will expire from 2028 to 2037, and $4,321 will expire in 2038. In addition, we had foreign net operating loss carryforwards of $209,238, of which $192,485 will expire from 2020 to 2022, $118 will expire in 2025 to 2026, and the remainder may be carried forward indefinitely.

At March 31, 2018, we had domestic credit carryforwards totaling $183,982, of which $104,474 expire in 2029 to 2038, and the remainder may be carried forward indefinitely.

The total amount of undistributed earnings of foreign subsidiaries was approximately $314,800 at March 31, 2018 and $162,800 at March 31, 2017. We recorded provisional amounts relating to the one-time transition tax on previously untaxed earnings of certain foreign subsidiaries as per the Act. We are reviewing whether the Act will affect our existing intention to reinvest indefinitely undistributed earnings of our foreign subsidiaries. Accordingly, no provision has been made for foreign withholding taxes or U.S. income taxes which may become payable if undistributed earnings of foreign subsidiaries are repatriated. It is not practicable to estimate the tax liability that would arise if these earnings were remitted.

We are regularly audited by domestic and foreign taxing authorities. Audits may result in tax assessments in excess of amounts claimed and the payment of additional taxes. We believe that our tax return positions comply with applicable tax law and that we have adequately provided for reasonably foreseeable assessments of additional taxes. Additionally, we believe that any assessments in excess of the amounts provided for will not have a material adverse effect on the Consolidated Financial Statements. It is possible that settlement of audits or the expiration of the statute of limitations may have an impact on our effective tax rate in future periods.

We recognize interest and penalties related to uncertain tax positions in the provision for income taxes in our Consolidated Statements of Operations. For the fiscal years ended March 31, 2018, 2017 and 2016, we recognized an increase in interest and penalties of $2,363, $877 and $1,098, respectively. The gross amount of interest and penalties accrued as of March 31, 2018 and 2017 was $6,453 and $4,090, respectively.

As of March 31, 2018 and 2017, we had gross unrecognized tax benefits, including interest and penalties, of $128,510 and $120,198, respectively, of which $22,805 and $36,940, respectively, would affect our effective tax rate if realized.

We are no longer subject to audit for U.S. federal income tax returns for periods prior to our fiscal year ended March 31, 2016 and state income tax returns for periods prior to the fiscal year ended March 31, 2013. With few exceptions, we are no longer subject to income tax examinations in non-U.S. jurisdictions for years prior to our fiscal year ended March 31, 2012. U.S. federal taxing authorities have completed examinations of our income tax returns through the fiscal year ended March 31, 2015.

The timing of the resolution of income tax examinations is highly uncertain, and the amounts ultimately paid, if any, upon resolution of the issues raised by the taxing authorities may differ materially from the amounts accrued for each year. Although potential resolution of uncertain tax positions involve multiple tax periods and jurisdictions, it is reasonably possible that a reduction of $8,400 of unrecognized tax benefits may occur within the next 12 months, some of which, depending on the nature of the settlement or expiration of statutes of limitations, may affect the Company’s income tax provision and therefore benefit the resulting effective tax rate. The actual amount could vary significantly depending on the ultimate timing and nature of any settlements.

The aggregate changes to the liability for gross uncertain tax positions, excluding interest and penalties, were as follows:



	Fiscal Year Ended March 31,
	2018			2017			2016
Balance, beginning of period	$	116,085		$	52,799		$	40,591
Additions:
Current year tax positions	23,007			65,669			12,208
Prior year tax positions	7,406			5,086			—
Reduction of prior year tax positions	(436		)	—			—
Lapse of statute of limitations	(24,006		)	(7,469		)	—
Balance, end of period	$	122,056		$	116,085		$	52,799

We believe that we have provided for any reasonably foreseeable outcomes related to our tax audits and that any settlement will not have a material adverse effect on our consolidated financial statements. However, there can be no assurances as to the possible outcomes.

STOCK-BASED COMPENSATION

12 Months Ended

Mar. 31, 2018

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

STOCK-BASED COMPENSATION

Stock Incentive Plan

In September 2017, our stockholders approved our 2017 Stock Incentive Plan (the "2017 Plan"). The aggregate number of shares issuable under the 2017 Plan is 7,596, subject to adjustment as set forth in the 2017 Plan, and, as of March 31, 2018, there were approximately 6,329 shares available for issuance. The 2017 Plan is administered by the Compensation Committee of the Board of Directors and allows for awards of restricted stock and other stock-based awards of our common stock to employees and non-employees, including to ZelnickMedia in connection with their contract to provide executive management service to us. Subject to the provisions of the plans, the Board of Directors or any Committee appointed by the Board of Directors, has the authority to determine the individuals to whom the equity awards are to be granted, the number of shares to be covered by each equity award, the vesting period, restrictions, if any, on the equity award and the terms and conditions of the equity award. Upon the vesting of certain stock-based awards, employees have the option to have the Company withhold shares to satisfy the employee's federal and state tax withholding requirements.

Stock-Based Compensation Expense

The following table summarizes stock-based compensation expense included in our Consolidated Statements of Operations:



	Fiscal Year Ended March 31,
	2018		2017		2016
Cost of goods sold	$	24,610	$	21,056	$	15,323
Selling and marketing	13,258		9,963		9,425
General and administrative	58,037		42,908		40,322
Research and development	18,020		7,952		4,926
Business reorganization	2,424		—		—
Stock-based compensation expense	$	116,349	$	81,879	$	69,996
Capitalized stock-based compensation expense	$	90,914	$	74,717	$	30,367

Restricted Stock Units

Employee Awards

Time-based restricted stock units granted to employees under our stock-based compensation plans generally vest either annually or quarterly over 3 years from the date of grant. Certain restricted stock units granted to key officers, senior-level employees, or key employees vest based on market conditions, primarily related to the performance of the price of our common stock. Certain restricted stock units granted to key officers, senior-level employees, or key employees vest based on performance conditions, primarily related to performance metrics around certain of our titles.

ZelnickMedia Non-Employee Awards

In connection with the 2014 Management Agreement, we granted restricted stock units to ZelnickMedia (see Note 2 - Management Agreement) as follows:



	Fiscal Year Ended March 31,
	2018	2017
Time-based	66	108
Market-based⁽¹⁾	122	199
Performance-based⁽¹⁾
New IP	21	33
Major IP	20	33
Total-Performance-based	41	66
Total Restricted Stock Units	229	373


(1)	Represents the maximum number of shares eligible to vest.

Time-based restricted stock units granted in fiscal 2018 are eligible to vest on April 4, 2019, provided that the 2017 Management Agreement has not been terminated prior to such vesting date, and those granted in fiscal 2017 vested on April 2, 2018.

Market-based restricted stock units granted in fiscal 2018 are eligible to vest on April 4, 2019, provided that the 2017 Management Agreement has not been terminated prior to such vesting date, and those granted in fiscal 2017 vested on April 2, 2018. Market-based restricted stock units are eligible to vest based on the Company's Total Shareholder Return (as defined in the relevant grant agreement) relative to the Total Shareholder Return (as defined in the relevant grant agreement) of the companies that constitute the NASDAQ Composite Index as of the grant date measured over a two-year period. To earn the target number of market-based restricted stock units (which represents 50% of the number of the market-based restricted stock units set forth in the table above), the Company must perform at the 50th percentile, with the maximum number of market-based restricted stock units earned if the Company performs at the 75th percentile. Each reporting period, we re-measure the fair value of the unvested shares of market-based restricted stock units granted to ZelnickMedia.

Performance-based restricted stock units granted in fiscal 2018 are eligible to vest on April 4, 2019, provided that the 2017 Management Agreement has not been terminated prior to such vesting date, and those granted in fiscal 2017 vested on April 2, 2018. Performance-based restricted stock units, of which 50% are tied to "New IP" and 50% to "Major IP" (as defined in the relevant grant agreement), are eligible to vest based on the Company's achievement of certain performance metrics (as defined in the relevant grant agreement) of individual product releases of "New IP" or "Major IP" measured over a two-year period. The target number of performance-based restricted stock units that may be earned pursuant to these grants is equal to 50% of the grant amounts set forth in the above table (which represents the maximum number of performance-based restricted stock units that may be earned). Each reporting period, we assess the performance metric and upon achievement of certain thresholds record an expense for the unvested portion of the shares of performance-based restricted stock units. Certain performance metrics, based on unit sales, have been achieved as of March 31, 2018 for the "New IP" and "Major IP" performance-based restricted stock units granted in 2017 and 2016.

The unvested portion of time-based, market-based and performance-based restricted stock units granted pursuant to the 2014 Management Agreement as of March 31, 2018 and 2017 was 602 and 899, respectively. During the fiscal year ended March 31, 2018, 479 restricted stock units previously granted to ZelnickMedia vested and 47 restricted stock units were forfeited by ZelnickMedia.

Fair Value of Stock-Based Awards

Time-Based Awards

The estimated value, based on the closing price of our stock on the grant date, of time-based restricted stock units granted to employees during the fiscal years ended March 31, 2018, 2017 and 2016 was $106.28, $49.43 and $33.74 per share, respectively.

For the fiscal years ended March 31, 2018, 2017 and 2016, the estimated value, based on the closing price of our stock on the grant date, of time-based restricted stock awards granted to ZelnickMedia was $78.53, $36.37 and $27.65 per share, respectively.

Market-Based Awards

The following table summarizes the weighted-average assumptions used in the Monte Carlo Simulation to estimate the fair value of market-based awards:



	Fiscal Year Ended March 31,
	2018				2017				2016
	Employee Market-Based		Non-Employee Market-Based		Employee Market-Based		Non-Employee Market-Based		Employee Market-Based		Non-Employee Market-Based
Risk-free interest rate	1.4	%	2.1	%	0.9	%	0.7	%	0.6	%	0.4	%
Expected stock price volatility	28.4	%	35.5	%	31.2	%	30.1	%	33.9	%	32.2	%
Expected service period (years)	1.5		1.0		1.5		1.0		1.9		1.1
Dividends	None		None		None		None		None		None

The estimated value of market-based restricted stock awards granted to employees during the fiscal years ended March 31, 2018, 2017 and 2016 was $141.78, $63.60 and $43.66 per share, respectively. For the fiscal years ended March 31, 2018, 2017 and 2016, the estimated value of the market-based restricted stock awards granted to ZelnickMedia was $185.66, $51.92 and $58.45 per share, respectively.

Performance-Based Awards

The estimated value of performance-based restricted stock awards granted to employees during the fiscal year ended March 31, 2018 was $102.57. None were granted during the fiscal years ended March 31, 2017 and 2016. For the fiscal years ended March 31, 2018, 2017 and 2016, the estimated value of the performance-based restricted stock awards granted to ZelnickMedia was $97.78, $59.27 and $37.67 per share, respectively.

Summary of Activity

The following table summarizes the activity in non-vested restricted stock units to employees and ZelnickMedia under our stock-based compensation plans with performance and market based restricted stock awards presented at 100% of target number of shares that may potentially vest:



	Shares (in thousands)		Weighted Average Fair Value on Grant Date
Non-vested restricted stock at March 31, 2017	4,259		$	32.93
Granted	8,039		101.72
Vested	(3,272	)	28.67
Forfeited	(1,629	)	107.05
Non-vested restricted stock at March 31, 2018	7,397		$	90.70

During the fiscal year ended March 31, 2018, we reclassified 5,550 of time and performance based restricted stock units as equity award grants. These awards were granted in prior periods and historically accounted for as liability awards as they previously could be settled only in cash and based on a contractually stipulated cash settlement value. However, in September 2017, we received stockholder approval to increase the number of shares of Common Stock for which awards may be granted and therefore now have the ability and intent to settle these awards in stock. As a result, we reclassified $74,707 from Other long-term liabilities to Additional paid-in capital within Stockholders' equity. Additionally, we recognized incremental cost of $112,789 to reflect the difference between the share price at the time of the share authorization and the contractually stipulated cash settlement value. Of these incremental costs, $84,176 was capitalized within Software development costs and licenses, net of current portion; $23,251 was recorded within Software development costs and royalties (a component of cost of goods sold); and $5,361 was recorded within Research and development costs.

The maximum number of restricted stock awards that could vest is 512 for performance-based and market-based restricted stock awards granted during the current year. As of March 31, 2018, the maximum number of shares that could vest is 1,399 for performance-based and market-based restricted stock units outstanding. For the fiscal years ended March 31, 2018, 2017 and 2016, the fair values of restricted stock units that vested were $268,570, $137,130 and $123,854, respectively.

During the fiscal year ended March 31, 2018, the forfeiture of awards resulted in the reversal of expense of $17,069 and amounts capitalized as software development costs of $53,779.

As of March 31, 2018, the total future unrecognized compensation cost related to outstanding unvested restricted stock was $640,672 and will be either recognized as compensation expense over a weighted-average period of approximately 3.0 years or capitalized as software development costs.

- Definition

The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details.

+ References + Details

SHARE REPURCHASE PROGRAM	12 Months Ended
SHARE REPURCHASE PROGRAM	Mar. 31, 2018
Equity [Abstract]
SHARE REPURCHASE PROGRAM	SHARE REPURCHASE PROGRAM Our Board of Directors has authorized the repurchase of up to 14,218 shares of our common stock. Under this program we may purchase shares from time to time through a variety of methods, including in the open market or through privately negotiated transactions, in accordance with applicable securities laws. Repurchases are subject to the availability of stock, prevailing market conditions, the trading price of the stock, the Company's financial performance and other conditions. The program does not require us to repurchase shares and may be suspended or discontinued at any time for any reason. During the fiscal years ended March 31, 2018, 2017, and 2016 we repurchased 1,513, 0, and 954 shares of our common stock in the open market, respectively, for $154,808, $0, and $26,552, respectively, including commissions of $16, $0 and $10, respectively as part of the program. As of March 31, 2018, we had repurchased a total of 6,684 shares of our common stock under the program, and, 7,534 shares of our common stock remained available for repurchase under the share repurchase program. Subsequent to March 31, 2018, we repurchased an additional 1,597 shares of our common stock in the open market for $153,515, including commissions of $16. After these additional purchases 5,937 shares of our common stock remain available for repurchase under the share repurchase program. All of the repurchased shares are classified as Treasury stock in our Consolidated Balance Sheets.

SEGMENT AND GEOGRAPHIC INFORMATION

12 Months Ended

Mar. 31, 2018

Segment Reporting [Abstract]

SEGMENT AND GEOGRAPHIC INFORMATION

We are a publisher of interactive software games designed for console systems and personal computers, including smart phones and tablets, which are delivered through physical retail, digital download, online platforms and cloud streaming services. Our business consists principally of our Rockstar Games and 2K labels, which represent a single operating segment, the "publishing segment." Our operations involve similar products and customers worldwide. Revenue earned from our publishing segment is primarily derived from the sale of internally developed software titles and software titles developed by third parties. Our publishing segment is based upon our internal organizational structure, the manner in which our operations are managed and the criteria used by our Chief Executive Officer, our Chief Operating Decision Maker ("CODM"), to evaluate performance and allocate resources. We are centrally managed and the CODM primarily uses consolidated financial information supplemented by sales information by product category, major product title and platform to make operational decisions and assess financial performance.

We attribute net revenue to geographic regions based on product destination. Net revenue by geographic region was as follows:



	Fiscal Year Ended March 31,
Net revenue by geographic region:	2018		2017		2016
United States	$	1,052,313	$	999,128	$	742,963
Europe	531,514		515,696		449,577
Asia Pacific	111,223		157,183		120,629
Canada and Latin America	97,842		107,741		100,529
Total net revenue	$	1,792,892	$	1,779,748	$	1,413,698

Net revenue by product platform was as follows:



	Fiscal Year Ended March 31,
Net revenue by product platform:	2018		2017		2016
Console	$	1,463,306	$	1,440,724	$	1,167,623
PC and other	329,586		339,024		246,075
Total net revenue	$	1,792,892	$	1,779,748	$	1,413,698

Our products are delivered through digital online services (digital download, online platforms and cloud streaming) and physical retail. Net revenue by distribution channel was as follows:



	Fiscal Year Ended March 31,
Net revenue by distribution channel:	2018		2017		2016
Digital online	$	1,130,946	$	921,734	$	697,658
Physical retail and other	661,946		858,014		716,040
Total net revenue	$	1,792,892	$	1,779,748	$	1,413,698

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

+ References

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+ Details

INTEREST AND OTHER, NET

12 Months Ended

Mar. 31, 2018

Other Income and Expenses [Abstract]

INTEREST AND OTHER, NET



	Fiscal Year Ended March 31,
	2018			2017			2016
Interest expense, net	$	(1,005	)	$	(21,700	)	$	(29,239	)
Foreign currency exchange (loss) gain	(3,038		)	4,990			(1,407		)
Other	5,091			1,020			441
Interest and other, net	$	1,048		$	(15,690	)	$	(30,205	)

ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)

12 Months Ended

Mar. 31, 2018

Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]

ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)

The following table provides the components of accumulated other comprehensive income (loss):



	Foreign currency translation adjustments			Unrealized gain (loss) on derivative instruments		Unrealized gain (loss) on cross-currency swap			Unrealized gain (loss) on available- for-sales securities			Total
Balance at March 31, 2016	$	(38,580	)	$	600	$	—		$	84		$	(37,896	)
Other comprehensive (loss) income before reclassifications	(9,086		)	—		—			(169		)	(9,255		)
Amounts reclassified from accumulated other comprehensive income (loss)	—			—		—			9			9
Balance at March 31, 2017	$	(47,666	)	$	600	$	—		$	(76	)	$	(47,142	)
Other comprehensive income (loss) before reclassifications	43,379			—		(15,659		)	(1,778		)	25,942
Amounts reclassified from accumulated other comprehensive income (loss)	—			—		7,506			—			7,506
Tax effect on cross-currency swap	—			—		(2,038		)	—			(2,038		)
Balance at March 31, 2018	$	(4,287	)	$	600	$	(10,191	)	$	(1,854	)	$	(15,732	)

- Definition

The entire disclosure for comprehensive income, which includes, but is not limited to, 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income.

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+ Details

BUSINESS REORGANIZATION	12 Months Ended
BUSINESS REORGANIZATION	Mar. 31, 2018
Restructuring and Related Activities [Abstract]
BUSINESS REORGANIZATION	BUSINESS REORGANIZATION In the first quarter of fiscal 2018, we announced and initiated actions to implement a strategic reorganization at one of our labels (the "2018 Plan"). In the fourth quarter of fiscal 2018, we announced and initiated a second phase of the 2018 plan. In connection with both phases of this initiative, we incurred business reorganization expenses of $14,742 during the fiscal year ended March 31, 2018 due primarily to employee separation costs. Through March 31, 2018, we had paid $3,895 related to these reorganization activities. As of March 31, 2018, $6,139 remained accrued for in Accrued expenses and other current liabilities and $4,708 in Other non-current liabilities. Although we may record additional expense or benefit in future periods to true-up estimates, we do not expect to incur additional reorganization in connection with the 2018 Plan. In fiscal 2016, we announced and initiated actions to implement a strategic reorganization at one of our labels (the "2016 Plan"), including reorganizing one development studio and closing two development studios. During fiscal 2016, we incurred business reorganization expenses of $71,285 due primarily to employee separation costs in connection with this initiative and have not incurred expenses in fiscal 2017 or 2018. Through March 31, 2018 and 2017, we had paid $5,350 related to these reorganization activities. As of March 31, 2018, and 2017, $65,935 remained accrued for in Accrued expenses and other current liabilities. See Note 13 for additional information.

SUPPLEMENTARY FINANCIAL INFORMATION

12 Months Ended

Mar. 31, 2018

Valuation and Qualifying Accounts [Abstract]

SUPPLEMENTARY FINANCIAL INFORMATION

The following table provides details of our valuation and qualifying accounts:



	Beginning Balance		Additions⁽¹⁾		Deductions			Other			Ending Balance
Fiscal Year Ended March 31, 2018
Valuation allowance for deferred income taxes	$	184,085	11,555		—			—			$	195,640
Price protection, sales returns and other allowances	$	65,114	59,674		(74,936		)	3,191			$	53,043
Allowance for doubtful accounts	1,369		—		(122		)	—			1,247
Total accounts receivable allowances	$	66,483	$	59,674	$	(75,058	)	$	3,191		$	54,290
Fiscal Year Ended March 31, 2017
Valuation allowance for deferred income taxes	$	170,574	13,511		—			—			$	184,085
Price protection, sales returns and other allowances	$	45,153	127,744		(100,934		)	(6,849		)	$	65,114
Allowance for doubtful accounts	399		974		(4		)	—			1,369
Total accounts receivable allowances	$	45,552	$	128,718	$	(100,938	)	$	(6,849	)	$	66,483
Fiscal Year Ended March 31, 2016
Valuation allowance for deferred income taxes	$	133,468	37,106		—			—			$	170,574
Price protection, sales returns and other allowances	$	69,305	64,498		(86,622		)	(2,028		)	$	45,153
Allowance for doubtful accounts	1,166		—		(767		)	—			399
Total accounts receivable allowances	$	70,471	$	64,498	$	(87,389	)	$	(2,028	)	$	45,552

⁽¹⁾Includes price protection of $27,088, $65,336 and $36,546; other allowances including rebates, discounts and cooperative advertising of $31,428, $45,850 and $23,073; and sales returns of $1,158, $16,558 and $4,879 for the fiscal years ended March 31, 2018, 2017 and 2016, respectively.

QUARTERLY FINANCIAL INFORMATION (UNAUDITED)

12 Months Ended

Mar. 31, 2018

Quarterly Financial Information Disclosure [Abstract]

QUARTERLY FINANCIAL INFORMATION (UNAUDITED)

The following tables set forth quarterly supplementary data for each of the years in the two-year period ended March 31, 2018:



	Quarter
Fiscal Year Ended March 31, 2018	First		Second			Third		Fourth
Net revenue	$	418,216	$	443,562		$	480,840	$	450,274
Gross profit	223,647		197,014			212,857		261,063
Income (loss) from operations	50,219		(11,319		)	8,852		87,825
Net income (loss)	$	60,276	$	(2,736	)	$	25,140	$	90,853
Earnings per share:
Basic earnings (loss) per share	$	0.57	$	(0.03	)	$	0.22	$	0.80
Diluted earnings (loss) per share	$	0.56	$	(0.03	)	$	0.21	$	0.77



	Quarter
Fiscal Year Ended March 31, 2017	First			Second		Third			Fourth
Net revenue	$	311,552		$	420,167	$	476,474		$	571,555
Gross profit	120,171			214,562		165,399			256,657
(Loss) income from operations	(38,983		)	47,194		(28,409		)	111,503
Net (loss) income	$	(38,567	)	$	36,432	$	(29,842	)	$	99,280
(Loss) earnings per share:
Basic (loss) earnings per share	$	(0.46	)	$	0.42	$	(0.33	)	$	0.97
Diluted (loss) earnings per share	$	(0.46	)	$	0.39	$	(0.33	)	$	0.89

Basic and diluted earnings (loss) per share are computed independently for each of the quarters presented. Therefore, the sum of quarterly basic and diluted earnings (loss) per share information may not equal annual basic and diluted earnings per share.

ACQUISITIONS

12 Months Ended

Mar. 31, 2018

Business Combinations [Abstract]

ACQUISITIONS

On January 31, 2017, we completed the acquisition of privately-held Social Point, S.L. (“Social Point”), a Spanish free-to-play mobile game developer, for consideration of $175,000 in cash and the issuance of 1,480 shares of our common stock, plus contingent earn-out consideration of up to an aggregate of $25,900 in cash and shares of our common stock. The cash portion was funded from our cash on hand. Certain of the shares that were issued to continuing employees are subject to transferability restrictions and forfeiture provisions requiring their continued employment subject to certain exceptions over the three-year period following the closing and are therefore considered share-based compensation over the service period.

We acquired Social Point to leverage its strong portfolio of technology, assembled workforce, and existing free-to-play mobile games in order to expand and enhance our game offerings, particularly on mobile platforms.

The acquisition-date fair value of the consideration transferred totaled $238,736, which consisted of the following:



	Fair value of purchase consideration
Cash	$	175,000
Common stock (1,071,739 shares)	57,327
Contingent earn-out	6,409
Total	$	238,736

Of the $175,000 cash consideration, $25,000 was contractually deferred and accrued for within Accrued expenses and other current liabilities within our Consolidated Balance Sheets. Subsequent to March 31, 2018 but prior to the issuance of this report on Form 10-K, we finalized the remaining $25,000 payment.

The fair value of the of the purchase consideration attributed to the common shares issued was calculated by using the Take-Two's closing share price on January 30, 2017, as the shares were transferred prior to the opening of the market on January 31, 2017.

The contingent earn-out consideration arrangement requires us to pay up to an aggregate of $25,900 in cash and shares of the Take-Two common stock, if Social Point achieves certain performance measures over the 12 and 24-month periods following the closing. The fair value of the contingent consideration arrangement at the acquisition date was $6,409. We estimated the fair value of the contingent consideration using a Monte Carlo simulation model. This fair value measurement is based on significant inputs not observable in the market and thus represents a Level 3 measurement as defined in ASC 820. (Refer to Note 3.) As of March 31, 2018, the fair value had decreased to $0 as a result of the lower probability of Social Point achieving certain performance measures in the 24-month period following the acquisition.

The following table summarizes the acquisition date fair value of net tangible and intangible assets acquired, net of liabilities assumed from Social Point.



	Fair value			Weighted average useful life
Tangible net assets (liabilities assumed)	$	(20,625	)	N/A
Intangible Assets
Developed game technology	53,950			4 years
In-process R&D	14,700			N/A
Analytics technology	29,700			5 years
User base	9,000			1 year
Branding and trade names	4,200			9 years
Goodwill	147,811			N/A
Total	$	238,736

Goodwill, which is not deductible for U.S. income tax purposes, represents the excess of the purchase price over the fair value of the net tangible and intangible assets acquired, and is primarily attributable to the assembled workforce of the acquired business and expected synergies at the time of the acquisition. During the fiscal year ended March 31, 2018, we recorded adjustments to finalize the purchase accounting for the Social Point acquisition, which resulted in a net increase in Goodwill of $4,245 and a corresponding decrease in Tangible net liabilities assumed.

We recognized $1,915 of acquisition related costs that were expensed in the fiscal year ended March 31, 2017. These costs were included in our Consolidated Statement of Operations within General and administrative expenses.

- Definition

The entire disclosure for a business combination (or series of individually immaterial business combinations) completed during the period, including background, timing, and recognized assets and liabilities. The disclosure may include leverage buyout transactions (as applicable).

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+ Details

BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES (Policies)

12 Months Ended

Mar. 31, 2018

Accounting Policies [Abstract]

Principles of Consolidation

Reclassifications

Certain immaterial amounts in the financial statements of the prior years have been reclassified to conform to the current year presentation for comparative purposes.

Use of Estimates

Concentration of Credit Risk and Accounts Receivable

We maintain cash balances at several major financial institutions. While we attempt to limit credit exposure with any single institution, balances often exceed insurable amounts.

Cash and Cash Equivalents

Short-term Investments

Inventory

Software Development Costs and Licenses

Capitalized software development costs include direct costs incurred for internally developed titles and payments made to third-party software developers under development agreements.

Fixed Assets, net

Goodwill and Intangible Assets

Long-lived Assets

Derivatives and Hedging

Income Taxes

Revenue Recognition


•	the period of time over which the substantial majority of a respective title’s estimated lifetime game sales and in-game virtual currency sales are expected to occur;


•	the period of time over which we plan to provide free unspecified add-on content updates, maintenance or other remaining material online support services associated with our online-enabled games;


•	the time over which we plan to dedicate internal resources to support the online functionality of a title;


•	known and expected online gameplay trends;


•	the results from prior analyses;


•	the nature of the game (e.g., annual title, genre, period of time between franchise title releases, etc.); and


•	the disclosed service periods for competitors’ games.



	Fiscal Year Ended
	March 31, 2018
Change in net revenue	$	(271,741	)
Change in income from operations	(250,589		)
Change in net income	(212,925		)
Change in earnings per share, basic	$	(1.93	)
Change in earnings per share, diluted	$	(1.81	)

Price protection and Allowances for Returns

Price Protection and Allowances for Returns

Consideration Given to Customers and Received from Vendors

Advertising

We expense advertising costs as incurred.

Stock-based Compensation

Stock-based compensation expense is recorded net of forfeitures as they occur.

Earnings (loss) per Share (EPS)

Earnings (loss) per Share ("EPS")

Foreign Currency

Comprehensive (Loss) Income

Comprehensive Income (Loss)

Recently Issued Accounting Pronouncements

Accounting for Goodwill

Accounting for Restricted Cash

Accounting for Leases

Revenue from Contracts with Customers

FAIR VALUE MEASUREMENTS (Tables)

12 Months Ended

Mar. 31, 2018

Fair Value Disclosures [Abstract]

Segregation of all assets measured at fair value on a recurring basis



	March 31, 2018			Quoted prices in active markets for identical assets (level 1)		Significant other observable inputs (level 2)			Significant unobservable inputs (level 3)		Balance Sheet Classification
Money market funds	$	516,626		$	516,626	$	—		$	—	Cash and cash equivalents
Bank-time deposits	21			21		—			—		Cash and cash equivalents
Commercial paper	10,796			—		10,796			—		Cash and cash equivalents
Corporate bonds	308,716			—		308,716			—		Short-term investments
US Treasuries	59,725			59,725		—			—		Short-term investments
Commercial paper	25,422			—		25,422			—		Short-term investments
Mutual funds	4,880			—		4,880			—		Short-term investments
Bank-time deposits	216,663			216,663		—			—		Short-term investments
Foreign currency forward contracts	12			—		12			—		Prepaid expenses and other
Foreign currency forward contracts	(43		)	—		(43		)	—		Accrued and other current liabilities
Cross-currency swap	(15,659		)	—		(15,659		)	—		Accrued and other current liabilities
Private equity	1,205			—		—			1,205		Other assets
Total recurring fair value measurements, net	$	1,128,364		$	793,035	$	334,124		$	1,205



	March 31, 2017			Quoted prices in active markets for identical assets (level 1)		Significant other observable inputs (level 2)			Significant unobservable inputs (level 3)			Balance Sheet Classification
Money market funds	$	646,386		$	646,386	$	—		$	—		Cash and cash equivalents
Bank-time deposits	46,605			46,605		—			—			Cash and cash equivalents
Commercial paper	38,268			—		38,268			—			Cash and cash equivalents
Corporate bonds	243,019			—		243,019			—			Short-term investments
Bank-time deposits	175,745			175,745		—			—			Short-term investments
Commercial paper	25,936			—		25,936			—			Short-term investments
Mutual funds	4,232			—		4,232			—			Short-term investments
Foreign currency forward contracts	2			—		2			—			Prepaid expenses and other
Foreign currency forward contracts	(352		)	—		(352		)	—			Accrued and other current liabilities
Private equity	570			—		—			570			Other assets
Contingent consideration	(6,465		)	—		—			(6,465		)	Other long-term liabilities
Total recurring fair value measurements, net	$	1,173,946		$	868,736	$	311,105		$	(5,895	)

SHORT-TERM INVESTMENTS (Tables)

12 Months Ended

Mar. 31, 2018

Investments, Debt and Equity Securities [Abstract]

Schedule of short-term investments

Our short-term investments consisted of the following as of March 31, 2018:



	March 31, 2018
	Cost or Amortized Cost		Gross Unrealized
	Cost or Amortized Cost		Gains		Losses			Fair Value
Short-term investments
Bank time deposits	$	216,663	$	—	$	—		$	216,663
Available-for-sale securities:
Corporate bonds	310,387		16		(1,687		)	308,716
US Treasuries	59,970		—		(245		)	59,725
Commercial paper	25,422		—		—			25,422
Mutual funds	4,876		16		(12		)	4,880
Total short-term investments	$	617,318	$	32	$	(1,944	)	$	615,406



	March 31, 2017
	Cost or Amortized Cost		Gross Unrealized
	Cost or Amortized Cost		Gains		Losses			Fair Value
Short-term investments
Bank time deposits	$	175,745	$	—	$	—		$	175,745
Available-for-sale securities:
Corporate bonds	243,140		98		(219		)	243,019
Commercial paper	25,938		5		(7		)	25,936
Mutual funds	4,118		123		(9		)	4,232
Total short-term investments	$	448,941	$	226	$	(235	)	$	448,932

Summary of the contracted maturities of short-term investments

The following table summarizes the contracted maturities of our short-term investments at March 31, 2018:



	March 31, 2018
	Amortized Cost		Fair Value
Short-term investments
Due in 1 year or less	$	509,981	$	508,853
Due in 1-2 years	107,337		106,553
Total short-term investments	$	617,318	$	615,406

- Definition

Tabular disclosure of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities.

+ References + Details

DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Tables)

12 Months Ended

Mar. 31, 2018

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of gross notional amounts of foreign currency forward contracts

The following table shows the gross notional amounts of foreign currency forward contracts:



	March 31,
	2018		2017
Forward contracts to sell foreign currencies	$	67,580	$	177,549
Forward contracts to purchase foreign currencies	$	4,359	$	9,170

- Definition

Tabular disclosure of pertinent information about a derivative or group of derivatives on a disaggregated basis, such as for individual instruments, or small groups of similar instruments. May include a combination of the type of instrument, risks being hedged, notional amount, hedge designation, related hedged item, inception date, maturity date, or other relevant item.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=64837297&loc=d3e41641-113959

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4B
-URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5624163-113959

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=64837297&loc=d3e41678-113959

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=64837297&loc=d3e41638-113959

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5580258-113959

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5579245-113959

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5624171-113959

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5579240-113959

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=64837297&loc=d3e41620-113959

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(n)(2))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

+ Details

INVENTORY (Tables)

12 Months Ended

Mar. 31, 2018

Inventory Disclosure [Abstract]

Inventory balances by category

Inventory balances by category are as follows:



	March 31,
	2018		2017
Finished products	$	13,940	$	15,530
Parts and supplies	1,222		793
Inventory	$	15,162	$	16,323

SOFTWARE DEVELOPMENT COSTS AND LICENSES (Tables)

12 Months Ended

Mar. 31, 2018

SOFTWARE DEVELOPMENT COSTS AND LICENSES

Schedule of capitalized software development costs and licenses

Details of our capitalized software development costs and licenses are as follows:



	March 31,
	2018				2017
	Current		Non-current		Current		Non-current
Software development costs, internally developed	$	19,338	$	515,761	$	28,959	$	310,229
Software development costs, externally developed	4,275		122,270		5,455		71,407
Licenses	9,671		1,338		7,307		274
Software development costs and licenses	$	33,284	$	639,369	$	41,721	$	381,910

Schedule of amortization and impairment of software development costs and licenses

Amortization and impairment of software development costs and licenses are as follows:



	Fiscal Year Ended March 31,
	2018			2017			2016
Amortization of software development costs and licenses	$	101,437		$	222,801		$	117,506
Impairment of software development costs and licenses	1,060			20,166			22,671
Less: Portion representing stock-based compensation	(24,610		)	(21,056		)	(5,705		)
Amortization and impairment, net of stock-based compensation	$	77,887		$	221,911		$	134,472

FIXED ASSETS, NET (Tables)

12 Months Ended

Mar. 31, 2018

Property, Plant and Equipment [Abstract]

Schedule of fixed asset balances by category

Fixed asset balances by category are as follows:



	March 31,
	2018			2017
Computer equipment	$	87,926		$	75,281
Computer software	47,702			41,527
Leasehold improvements	88,762			56,758
Office equipment	8,139			5,843
Furniture and fixtures	13,933			9,108
	246,462			188,517
Less: accumulated depreciation	(143,984		)	(121,217		)
Fixed assets, net	$	102,478		$	67,300

GOODWILL AND INTANGIBLE ASSETS, NET (Tables)

12 Months Ended

Mar. 31, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of change in goodwill balance

The change in our goodwill balance is as follows:



	Total
Balance at March 31, 2016	$	217,080
Additions and adjustments (see Note 23)	143,952
Currency translation adjustment	(1,917		)
Balance at March 31, 2017	$	359,115
Additions from immaterial acquisition	6,236
Adjustments (see Note 23)	4,245
Currency translation adjustment	$	29,934
Balance at March 31, 2018	$	399,530

Schedule of components of the intangible assets subject to amortization

The following table sets forth the intangible assets that are subject to amortization:



	March 31,
	2018							2017
	Gross Carrying Amount		Accumulated Amortization			Net Book Value		Gross Carrying Amount		Accumulated Amortization			Net Book Value
Intellectual property	$	37,431	$	(13,616	)	$	23,815	$	15,931	$	(12,943	)	$	2,988
Developed game technology	67,133		(23,189		)	43,944		54,421		(2,659		)	51,762
Analytics technology	34,499		(8,050		)	26,449		29,959		(999		)	28,960
User base	10,454		(10,454		)	—		9,079		(1,513		)	7,566
Branding and trade names	4,879		(632		)	4,247		4,237		(78		)	4,159
Total definite-lived intangible assets	$	154,396	$	(55,941	)	$	98,455	$	113,627	$	(18,192	)	$	95,435

Schedule of amortization of intangible assets

Amortization of intangible assets is included in our Consolidated Statements of Operations as follows:



	Fiscal Year Ended March 31,
	2018		2017		2016
Cost of goods sold	$	19,719	$	4,252	$	160
Selling and marketing	8,107		1,497		—
Research and development	6,494		989		—
Depreciation and amortization	510		78		—
Total amortization of intangible assets	$	34,830	$	6,816	$	160

Schedule of estimated future amortization of intangible assets

Estimated future amortization of intangible assets that will be recorded in cost of goods sold and operating expenses for the years ending March 31, are as follows:



Fiscal Year Ended March 31,	Amortization
2019	$	31,683
2020	28,223
2021	18,445
2022	10,774
2023	4,295

ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES (Tables)

12 Months Ended

Mar. 31, 2018

Liabilities, Current [Abstract]

Components of accrued expenses and other current liabilities

Accrued expenses and other current liabilities consisted of:



	March 31,
	2018		2017
Software development royalties	$	600,512	$	492,133
Business reorganization (see Note 20)	72,074		65,935
Compensation and benefits	57,499		44,843
Licenses	43,261		37,019
Deferred acquisition payments	25,000		25,000
Marketing and promotions	19,731		21,030
Other	96,671		64,915
Accrued expenses and other current liabilities	$	914,748	$	750,875

DEBT (Tables)

12 Months Ended

Mar. 31, 2018

Debt Instrument [Line Items]

Information related to availability on our Credit Agreement is as follows:



	March 31,
	2018		2017
Available borrowings	$	98,335	$	98,320
Outstanding letters of credit	$	1,664	$	1,664

1.00% Convertible Notes due 2018

Debt Instrument [Line Items]

Schedule of additional information related to convertible notes

The following table provides additional information related to our 1.00% Convertible Notes:



	March 31,
	2018		2017
Additional paid-in capital	$	35,784	$	35,784
Principal amount of 1.00% Convertible Notes	$	8,160	$	268,149
Unamortized discount of the liability component	89		15,751
Carrying amount of debt issuance costs	3		469
Net carrying amount of 1.00% Convertible Notes	$	8,068	$	251,929

Schedule of components of interest expense related to convertible notes

The following table provides the components of interest expense related to our 1.00% Convertible Notes:



	Fiscal Year Ended March 31,
	2018		2017		2016
Cash interest expense (coupon interest expense)	$	539	$	2,784	$	2,875
Non-cash amortization of discount on 1.00% Convertible Notes	15,662		14,221		12,085
Amortization of debt issuance costs	466		453		443
Total interest expense related to 1.00% Convertible Notes	$	16,667	$	17,458	$	15,403

EARNINGS PER SHARE ("EPS") (Tables)

12 Months Ended

Mar. 31, 2018

Earnings Per Share [Abstract]

Schedule of computation of basic and diluted EPS

The following table sets forth the computation of basic and diluted EPS (in thousands except per share amounts):



	Fiscal Year Ended March 31,
	2018				2017			2016
Computation of Basic earnings (loss) per share:
Net income (loss)	$	173,533			$	67,303		$	(8,302	)
Less: net income allocated to participating securities	(159		)		(1,275		)	—
Net income (loss) for basic earnings (loss) per share calculation	$	173,374			$	66,028		$	(8,302	)
Total weighted average shares outstanding—basic	110,210				91,921			83,417
Less: weighted average participating shares outstanding	(101		)		(1,741		)	—
Weighted average common shares outstanding—basic	110,109				90,180			83,417
Basic earnings (loss) per share	$	1.57			$	0.73		$	(0.10	)
Computation of Diluted earnings (loss) per share:
Net income (loss)	$	173,533			$	67,303		$	(8,302	)
Less: net income allocated to participating securities	(155		)		(1,246		)	—
Net income (loss) for diluted earnings (loss) per share calculation	$	173,378			$	66,057		$	(8,302	)
Weighted average common shares outstanding—basic	110,109				91,921			83,417
Add: dilutive effect of common stock equivalents	2,755			2,755	2,152			—
Weighted average common shares outstanding—diluted	112,864				94,073			83,417
Less: weighted average participating shares outstanding	(101		)		(1,741		)	—
Weighted average common shares outstanding- diluted	112,763				92,332			83,417
Diluted earnings (loss) per share	$	1.54			$	0.72		$	(0.10	)

COMMITMENTS AND CONTINGENCIES (Tables)

12 Months Ended

Mar. 31, 2018

Commitments and Contingencies Disclosure [Abstract]

Summary of annual minimum contractual obligations

A summary of annual minimum contractual obligations and commitments as of March 31, 2018 is as follows:



Fiscal Year Ending March 31,	Software Development and Licensing		Marketing		Operating Leases		Purchase Obligations		Convertible Notes Interest		Convertible Notes		Total
2019	$	116,242	$	49,725	$	39,113	$	21,549	$	20	$	8,160	$	234,809
2020	53,534		4,060		29,620		7,046		—		—		94,260
2021	28,999		13,480		23,092		1,629		—		—		67,200
2022	21,748		3,773		21,665		—		—		—		47,186
2023	6,250		3,500		19,571		—		—		—		29,321
Thereafter	5,250		—		62,476		—		—		—		67,726
Total	$	232,023	$	74,538	$	195,537	$	30,224	$	20	$	8,160	$	540,502

INCOME TAXES (Tables)

12 Months Ended

Mar. 31, 2018

Income Tax Disclosure [Abstract]

Schedule of of (loss) income from continuing operations before income taxes

Components of income (loss) before income taxes are as follows:



	Fiscal Year Ended March 31,
	2018		2017			2016
Domestic	$	136,239	$	86,050		$	(94,174	)
Foreign	386		(9,085		)	55,824
Income (loss) before income taxes	$	136,625	$	76,965		$	(38,350	)

Schedule of provision for current and deferred income taxes

Provision (benefit from) for current and deferred income taxes consists of the following:



	Fiscal Year Ended March 31,
	2018			2017			2016
Current:
U.S. federal	$	(7,327	)	$	19,271		$	792
U.S. state and local	(1,266		)	2,521			938
Foreign	4,208			(13,012		)	(31,508		)
Total current income taxes	(4,385		)	8,780			(29,778		)
Deferred:
U.S. federal	(13,530		)	969			1,211
U.S. state and local	195			2,395			(231		)
Foreign	(19,188		)	(2,482		)	(1,250		)
Total deferred income taxes	(32,523		)	882			(270		)
Provision (benefit from) for income taxes	$	(36,908	)	$	9,662		$	(30,048	)

Schedule of reconciliation of effective tax rate to the U.S. statutory federal income tax rate

A reconciliation of our effective tax rate to the U.S. statutory federal income tax rate is as follows:



	Fiscal Year Ended March 31,
	2018		2017		2016
U.S. federal statutory rate	31.6	%	35.0	%	35.0	%
State and local taxes, net of U.S. federal benefit	0.5	%	4.9	%	1.6	%
Foreign tax rate differential⁽¹⁾	(6.9	)%	(1.4	)%	25.8	%
Foreign earnings	1.2	%	5.5	%	(3.7	)%
Tax credits ⁽²⁾	(16.5	)%	(45.8	)%	98.7	%
Excess tax benefits from stock-based compensation ⁽³⁾	(38.9	)%	—		—
One-time transition tax⁽⁴⁾	19.5	%	—		—
Domestic production deduction	(2.8	)%	(2.5	)%	—
Valuation allowance—domestic⁽⁵⁾	(0.5	)%	10.1	%	(77.8	)%
Valuation allowance—foreign	(2.5	)%	0.1	%	10.4	%
Change in reserves	(11.0	)%	2.9	%	(7.0	)%
Other	(0.7	)%	3.7	%	(4.6	)%
Effective tax rate	(27.0	)%	12.5	%	78.4	%

(2) Tax benefits were recorded for fiscal years ended March 31, 2018, 2017, and 2016 attributable to certain tax credits related to software development activities.

(4) Represents provisional estimate in accordance with SAB 118, relating to one-time transition tax on previously untaxed earnings of certain foreign subsidiaries per the Act.

(5) The change in domestic valuation allowance includes tax benefits recognized as a result of the Act from indefinite lived intangibles.

Schedule of effects of temporary differences that gave rise to deferred tax assets and liabilities

The effects of temporary differences that gave rise to our deferred tax assets and liabilities were as follows:



	March 31,
	2018			2017
Deferred tax assets:
Accrued compensation expense	$	94,919		$	131,305
Equity-based compensation	78,293			25,048
Deferred revenue	42,426			41,977
Net operating loss carryforward	35,378			20,131
Tax credit carryforward	64,175			52,639
Business reorganization	16,369			24,103
Sales returns and allowances (including bad debt)	575			3,942
Deferred rent	5,729			8,865
Other	1,145			4,045
Total deferred tax assets	339,009			312,055
Less: Valuation allowance	(195,640		)	(184,085		)
Net deferred tax assets	143,369			127,970
Deferred tax liabilities:
Capitalized software and depreciation	(118,119		)	(120,715		)
Convertible debt	(13		)	(5,219		)
Intangible amortization	(24,651		)	(38,068		)
Other	(4,534		)	—
Total deferred tax liabilities	(147,317		)	(164,002		)
Net deferred tax liability⁽¹⁾	(3,948		)	(36,032		)

(1) As of March 31, 2018 and 2017, $3,948 and $36,032, respectively, is included in Other long-term liabilities.

Schedule of aggregate changes to the liability for gross uncertain tax positions, excluding interest and penalties

The aggregate changes to the liability for gross uncertain tax positions, excluding interest and penalties, were as follows:



	Fiscal Year Ended March 31,
	2018			2017			2016
Balance, beginning of period	$	116,085		$	52,799		$	40,591
Additions:
Current year tax positions	23,007			65,669			12,208
Prior year tax positions	7,406			5,086			—
Reduction of prior year tax positions	(436		)	—			—
Lapse of statute of limitations	(24,006		)	(7,469		)	—
Balance, end of period	$	122,056		$	116,085		$	52,799

STOCK-BASED COMPENSATION (Tables)

12 Months Ended

Mar. 31, 2018

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of stock-based compensation expenses

The following table summarizes stock-based compensation expense included in our Consolidated Statements of Operations:



	Fiscal Year Ended March 31,
	2018		2017		2016
Cost of goods sold	$	24,610	$	21,056	$	15,323
Selling and marketing	13,258		9,963		9,425
General and administrative	58,037		42,908		40,322
Research and development	18,020		7,952		4,926
Business reorganization	2,424		—		—
Stock-based compensation expense	$	116,349	$	81,879	$	69,996
Capitalized stock-based compensation expense	$	90,914	$	74,717	$	30,367

Schedule of restricted stock awarded activity to ZelnickMedia

In connection with the 2014 Management Agreement, we granted restricted stock units to ZelnickMedia (see Note 2 - Management Agreement) as follows:



	Fiscal Year Ended March 31,
	2018	2017
Time-based	66	108
Market-based⁽¹⁾	122	199
Performance-based⁽¹⁾
New IP	21	33
Major IP	20	33
Total-Performance-based	41	66
Total Restricted Stock Units	229	373


(1)	Represents the maximum number of shares eligible to vest.

Schedule of weighted-average assumptions used to value outstanding market-based restricted shares

The following table summarizes the weighted-average assumptions used in the Monte Carlo Simulation to estimate the fair value of market-based awards:



	Fiscal Year Ended March 31,
	2018				2017				2016
	Employee Market-Based		Non-Employee Market-Based		Employee Market-Based		Non-Employee Market-Based		Employee Market-Based		Non-Employee Market-Based
Risk-free interest rate	1.4	%	2.1	%	0.9	%	0.7	%	0.6	%	0.4	%
Expected stock price volatility	28.4	%	35.5	%	31.2	%	30.1	%	33.9	%	32.2	%
Expected service period (years)	1.5		1.0		1.5		1.0		1.9		1.1
Dividends	None		None		None		None		None		None

Schedule of activity in non-vested restricted stock awards to employees and ZelnickMedia



	Shares (in thousands)		Weighted Average Fair Value on Grant Date
Non-vested restricted stock at March 31, 2017	4,259		$	32.93
Granted	8,039		101.72
Vested	(3,272	)	28.67
Forfeited	(1,629	)	107.05
Non-vested restricted stock at March 31, 2018	7,397		$	90.70

SEGMENT AND GEOGRAPHIC INFORMATION (Tables)

12 Months Ended

Mar. 31, 2018

Segment Reporting [Abstract]

Net revenue by geographic region

We attribute net revenue to geographic regions based on product destination. Net revenue by geographic region was as follows:



	Fiscal Year Ended March 31,
Net revenue by geographic region:	2018		2017		2016
United States	$	1,052,313	$	999,128	$	742,963
Europe	531,514		515,696		449,577
Asia Pacific	111,223		157,183		120,629
Canada and Latin America	97,842		107,741		100,529
Total net revenue	$	1,792,892	$	1,779,748	$	1,413,698

Net revenue by product platform

Net revenue by product platform was as follows:



	Fiscal Year Ended March 31,
Net revenue by product platform:	2018		2017		2016
Console	$	1,463,306	$	1,440,724	$	1,167,623
PC and other	329,586		339,024		246,075
Total net revenue	$	1,792,892	$	1,779,748	$	1,413,698

Net revenue by distribution channel

Our products are delivered through digital online services (digital download, online platforms and cloud streaming) and physical retail. Net revenue by distribution channel was as follows:



	Fiscal Year Ended March 31,
Net revenue by distribution channel:	2018		2017		2016
Digital online	$	1,130,946	$	921,734	$	697,658
Physical retail and other	661,946		858,014		716,040
Total net revenue	$	1,792,892	$	1,779,748	$	1,413,698

INTEREST AND OTHER, NET (Tables)

12 Months Ended

Mar. 31, 2018

Other Income and Expenses [Abstract]

Schedule of interest and other, net



	Fiscal Year Ended March 31,
	2018			2017			2016
Interest expense, net	$	(1,005	)	$	(21,700	)	$	(29,239	)
Foreign currency exchange (loss) gain	(3,038		)	4,990			(1,407		)
Other	5,091			1,020			441
Interest and other, net	$	1,048		$	(15,690	)	$	(30,205	)

ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Tables)

12 Months Ended

Mar. 31, 2018

Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]

Schedule of components of accumulated other comprehensive (loss) income

The following table provides the components of accumulated other comprehensive income (loss):



	Foreign currency translation adjustments			Unrealized gain (loss) on derivative instruments		Unrealized gain (loss) on cross-currency swap			Unrealized gain (loss) on available- for-sales securities			Total
Balance at March 31, 2016	$	(38,580	)	$	600	$	—		$	84		$	(37,896	)
Other comprehensive (loss) income before reclassifications	(9,086		)	—		—			(169		)	(9,255		)
Amounts reclassified from accumulated other comprehensive income (loss)	—			—		—			9			9
Balance at March 31, 2017	$	(47,666	)	$	600	$	—		$	(76	)	$	(47,142	)
Other comprehensive income (loss) before reclassifications	43,379			—		(15,659		)	(1,778		)	25,942
Amounts reclassified from accumulated other comprehensive income (loss)	—			—		7,506			—			7,506
Tax effect on cross-currency swap	—			—		(2,038		)	—			(2,038		)
Balance at March 31, 2018	$	(4,287	)	$	600	$	(10,191	)	$	(1,854	)	$	(15,732	)

SUPPLEMENTARY FINANCIAL INFORMATION (Tables)

12 Months Ended

Mar. 31, 2018

Valuation and Qualifying Accounts [Abstract]

Schedule of details of valuation and qualifying accounts

The following table provides details of our valuation and qualifying accounts:



	Beginning Balance		Additions⁽¹⁾		Deductions			Other			Ending Balance
Fiscal Year Ended March 31, 2018
Valuation allowance for deferred income taxes	$	184,085	11,555		—			—			$	195,640
Price protection, sales returns and other allowances	$	65,114	59,674		(74,936		)	3,191			$	53,043
Allowance for doubtful accounts	1,369		—		(122		)	—			1,247
Total accounts receivable allowances	$	66,483	$	59,674	$	(75,058	)	$	3,191		$	54,290
Fiscal Year Ended March 31, 2017
Valuation allowance for deferred income taxes	$	170,574	13,511		—			—			$	184,085
Price protection, sales returns and other allowances	$	45,153	127,744		(100,934		)	(6,849		)	$	65,114
Allowance for doubtful accounts	399		974		(4		)	—			1,369
Total accounts receivable allowances	$	45,552	$	128,718	$	(100,938	)	$	(6,849	)	$	66,483
Fiscal Year Ended March 31, 2016
Valuation allowance for deferred income taxes	$	133,468	37,106		—			—			$	170,574
Price protection, sales returns and other allowances	$	69,305	64,498		(86,622		)	(2,028		)	$	45,153
Allowance for doubtful accounts	1,166		—		(767		)	—			399
Total accounts receivable allowances	$	70,471	$	64,498	$	(87,389	)	$	(2,028	)	$	45,552

QUARTERLY FINANCIAL INFORMATION (UNAUDITED) (Tables)

12 Months Ended

Mar. 31, 2018

Quarterly Financial Information Disclosure [Abstract]

Schedule of quarterly supplementary data

The following tables set forth quarterly supplementary data for each of the years in the two-year period ended March 31, 2018:



	Quarter
Fiscal Year Ended March 31, 2018	First		Second			Third		Fourth
Net revenue	$	418,216	$	443,562		$	480,840	$	450,274
Gross profit	223,647		197,014			212,857		261,063
Income (loss) from operations	50,219		(11,319		)	8,852		87,825
Net income (loss)	$	60,276	$	(2,736	)	$	25,140	$	90,853
Earnings per share:
Basic earnings (loss) per share	$	0.57	$	(0.03	)	$	0.22	$	0.80
Diluted earnings (loss) per share	$	0.56	$	(0.03	)	$	0.21	$	0.77



	Quarter
Fiscal Year Ended March 31, 2017	First			Second		Third			Fourth
Net revenue	$	311,552		$	420,167	$	476,474		$	571,555
Gross profit	120,171			214,562		165,399			256,657
(Loss) income from operations	(38,983		)	47,194		(28,409		)	111,503
Net (loss) income	$	(38,567	)	$	36,432	$	(29,842	)	$	99,280
(Loss) earnings per share:
Basic (loss) earnings per share	$	(0.46	)	$	0.42	$	(0.33	)	$	0.97
Diluted (loss) earnings per share	$	(0.46	)	$	0.39	$	(0.33	)	$	0.89

ACQUISITIONS (Tables)

12 Months Ended

Mar. 31, 2018

Business Combinations [Abstract]

Schedule of Business Acquisitions, by Acquisition

The acquisition-date fair value of the consideration transferred totaled $238,736, which consisted of the following:



	Fair value of purchase consideration
Cash	$	175,000
Common stock (1,071,739 shares)	57,327
Contingent earn-out	6,409
Total	$	238,736

Schedule of Recognized Identified Assets Acquired and Liabilities Assumed

The following table summarizes the acquisition date fair value of net tangible and intangible assets acquired, net of liabilities assumed from Social Point.



	Fair value			Weighted average useful life
Tangible net assets (liabilities assumed)	$	(20,625	)	N/A
Intangible Assets
Developed game technology	53,950			4 years
In-process R&D	14,700			N/A
Analytics technology	29,700			5 years
User base	9,000			1 year
Branding and trade names	4,200			9 years
Goodwill	147,811			N/A
Total	$	238,736

Finite-Lived and Indefinite-Lived Intangible Assets Acquired as Part of Business Combination

The following table summarizes the acquisition date fair value of net tangible and intangible assets acquired, net of liabilities assumed from Social Point.



	Fair value			Weighted average useful life
Tangible net assets (liabilities assumed)	$	(20,625	)	N/A
Intangible Assets
Developed game technology	53,950			4 years
In-process R&D	14,700			N/A
Analytics technology	29,700			5 years
User base	9,000			1 year
Branding and trade names	4,200			9 years
Goodwill	147,811			N/A
Total	$	238,736

BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - WHOLLY OWNED LABELS (Details)	12 Months Ended
	Mar. 31, 2018 label
Accounting Policies [Abstract]
Wholly owned labels	2

BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - CONCENTRATION RISK (Details) - number_of_customer	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Concentration of Credit Risk and Accounts Receivable
Number of customers	5
Net revenue \| Customer concentration risk \| Five largest customers
Concentration of Credit Risk and Accounts Receivable
Concentration risk rate	70.70%	65.50%	58.90%
Net revenue \| Customer concentration risk \| One Customer
Concentration of Credit Risk and Accounts Receivable
Concentration risk rate	30.20%	26.30%	20.70%
Net revenue \| Customer concentration risk \| Second Customer
Concentration of Credit Risk and Accounts Receivable
Concentration risk rate	17.60%	14.20%	15.50%
Net revenue \| Customer concentration risk \| Third Customer
Concentration of Credit Risk and Accounts Receivable
Concentration risk rate	10.90%
Gross accounts receivable \| Credit concentration risk \| Five largest customers
Concentration of Credit Risk and Accounts Receivable
Concentration risk rate	65.40%	69.90%
Gross accounts receivable \| Credit concentration risk \| Additional customer two
Concentration of Credit Risk and Accounts Receivable
Number of customers	2
Concentration risk rate	37.70%	15.50%
Gross accounts receivable \| Credit concentration risk \| Additional customer three
Concentration of Credit Risk and Accounts Receivable
Concentration risk rate	40.20%	17.40%
Gross accounts receivable \| Credit concentration risk \| Customers individually accounting for more than 10%
Concentration of Credit Risk and Accounts Receivable
Concentration risk rate	53.20%	57.60%

BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - FIXED ASSETS (Details)	12 Months Ended
	Mar. 31, 2018
Office equipment
Fixed assets
Estimated useful life	5 years
Furniture and fixtures
Fixed assets
Estimated useful life	5 years
Leasehold improvements
Fixed assets
Estimated useful life	7 years
Minimum \| Computer software
Fixed assets
Estimated useful life	3 years
Minimum \| Computer equipment
Fixed assets
Estimated useful life	3 years
Maximum \| Computer software
Fixed assets
Estimated useful life	5 years
Maximum \| Computer equipment
Fixed assets
Estimated useful life	5 years

BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - REVENUE RECOGNITION (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Change in Accounting Estimate [Line Items]
Minimum estimated service period									30 days
Maximum estimated service period									60 days
Estimated service period									12 months
Net revenue	$ 450,274	$ 480,840	$ 443,562	$ 418,216	$ 571,555	$ 476,474	$ 420,167	$ 311,552	$ 1,792,892	$ 1,779,748	$ 1,413,698
Change in income from operations									136,625	76,965	(38,350)
Change in net income	$ 90,853	$ 25,140	$ (2,736)	$ 60,276	$ 99,280	$ (29,842)	$ 36,432	$ (38,567)	$ 173,533	$ 67,303	$ (8,302)
Change in earnings per share, basic	$ 0.80	$ 0.22	$ (0.03)	$ 0.57	$ 0.97	$ (0.33)	$ 0.42	$ (0.46)	$ 1.57	$ 0.73	$ (0.10)
Change in earnings per share, diluted	$ 0.77	$ 0.21	$ (0.03)	$ 0.56	$ 0.89	$ (0.33)	$ 0.39	$ (0.46)	$ 1.54	$ 0.72	$ (0.10)
Grand theft auto V product \| Service Life
Change in Accounting Estimate [Line Items]
Estimated service period									62 months
Net revenue									$ (271,741)
Change in income from operations									(250,589)
Change in net income									$ (212,925)
Change in earnings per share, basic									$ (1.93)
Change in earnings per share, diluted									$ (1.81)

BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - ADVERTISING (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Accounting Policies [Abstract]
Advertising expense	$ 140,618	$ 173,947	$ 94,743

BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - RECENTLY ISSUED ACCOUNTING PRONOUNCEMENTS (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of new accounting principle	$ (323)
Excess tax benefits on stock-based compensation	(53,169)
Accounting Standards Update 2016-09 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deferred tax assets		$ 24,594
Minimum \| Accounting Standards Update 2014-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of new accounting principle	360,000
Maximum \| Accounting Standards Update 2014-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of new accounting principle	$ 440,000
Retained Earnings/(Accumulated Deficit) \| Accounting Standards Update 2016-09, Forfeiture Rate Component [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of new accounting principle		(323)
Additional Paid-in Capital \| Accounting Standards Update 2016-09, Forfeiture Rate Component [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of new accounting principle		$ (323)

MANAGEMENT AGREEMENT (Details) - USD ($) $ in Thousands		1 Months Ended	12 Months Ended
MANAGEMENT AGREEMENT (Details) - USD ($) $ in Thousands	Jan. 01, 2018	Mar. 31, 2014	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Management Agreement
Stock-based compensation expense for non-employee awards			$ 32,801	$ 29,573	$ 26,652
Zelnick Media Corporation \| 2014 Management Agreement
Management Agreement
Annual management fee		$ 2,970
Consulting expense benefit			$ 8,426	$ 7,722	$ 7,722
Zelnick Media Corporation \| 2014 Management Agreement \| Maximum
Management Agreement
Bonus per fiscal year based on the achievement of certain performance thresholds		$ 4,752
Zelnick Media Corporation \| 2017 Management Agreement
Management Agreement
Annual management fee	$ 3,100
Zelnick Media Corporation \| 2017 Management Agreement \| Maximum
Management Agreement
Bonus per fiscal year based on the achievement of certain performance thresholds	$ 7,440

FAIR VALUE MEASUREMENTS - ASSETS MEASURED AT FAIR VALUE (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands	Mar. 31, 2018	Mar. 31, 2017
Assets measured at fair value on a recurring basis
Total recurring fair value measurements, net	$ 1,128,364	$ 1,173,946
Other assets
Assets measured at fair value on a recurring basis
Private equity	1,205	570
Other long-term liabilities
Assets measured at fair value on a recurring basis
Contingent consideration		(6,465)
Quoted prices in active markets for identical assets (level 1)
Assets measured at fair value on a recurring basis
Total recurring fair value measurements, net	793,035	868,736
Quoted prices in active markets for identical assets (level 1) \| Other assets
Assets measured at fair value on a recurring basis
Private equity	0	0
Quoted prices in active markets for identical assets (level 1) \| Other long-term liabilities
Assets measured at fair value on a recurring basis
Contingent consideration		0
Significant other observable inputs (level 2)
Assets measured at fair value on a recurring basis
Total recurring fair value measurements, net	334,124	311,105
Significant other observable inputs (level 2) \| Other assets
Assets measured at fair value on a recurring basis
Private equity	0	0
Significant other observable inputs (level 2) \| Other long-term liabilities
Assets measured at fair value on a recurring basis
Contingent consideration		0
Significant unobservable inputs (level 3)
Assets measured at fair value on a recurring basis
Total recurring fair value measurements, net	1,205	(5,895)
Significant unobservable inputs (level 3) \| Other assets
Assets measured at fair value on a recurring basis
Private equity	1,205	570
Significant unobservable inputs (level 3) \| Other long-term liabilities
Assets measured at fair value on a recurring basis
Contingent consideration		(6,465)
Money market funds \| Cash and cash equivalents
Assets measured at fair value on a recurring basis
Cash and cash equivalents	516,626	646,386
Money market funds \| Quoted prices in active markets for identical assets (level 1) \| Cash and cash equivalents
Assets measured at fair value on a recurring basis
Cash and cash equivalents	516,626	646,386
Money market funds \| Significant other observable inputs (level 2) \| Cash and cash equivalents
Assets measured at fair value on a recurring basis
Cash and cash equivalents	0	0
Money market funds \| Significant unobservable inputs (level 3) \| Cash and cash equivalents
Assets measured at fair value on a recurring basis
Cash and cash equivalents	0	0
Bank-time deposits \| Cash and cash equivalents
Assets measured at fair value on a recurring basis
Cash and cash equivalents	21	46,605
Bank-time deposits \| Short-term investments
Assets measured at fair value on a recurring basis
Short-term investments	216,663	175,745
Bank-time deposits \| Quoted prices in active markets for identical assets (level 1) \| Cash and cash equivalents
Assets measured at fair value on a recurring basis
Cash and cash equivalents	21	46,605
Bank-time deposits \| Quoted prices in active markets for identical assets (level 1) \| Short-term investments
Assets measured at fair value on a recurring basis
Short-term investments	216,663	175,745
Bank-time deposits \| Significant other observable inputs (level 2) \| Cash and cash equivalents
Assets measured at fair value on a recurring basis
Cash and cash equivalents	0	0
Bank-time deposits \| Significant other observable inputs (level 2) \| Short-term investments
Assets measured at fair value on a recurring basis
Short-term investments	0	0
Bank-time deposits \| Significant unobservable inputs (level 3) \| Cash and cash equivalents
Assets measured at fair value on a recurring basis
Cash and cash equivalents	0	0
Bank-time deposits \| Significant unobservable inputs (level 3) \| Short-term investments
Assets measured at fair value on a recurring basis
Short-term investments	0	0
Commercial paper \| Cash and cash equivalents
Assets measured at fair value on a recurring basis
Cash and cash equivalents	10,796	38,268
Commercial paper \| Short-term investments
Assets measured at fair value on a recurring basis
Short-term investments	25,422	25,936
Commercial paper \| Quoted prices in active markets for identical assets (level 1) \| Cash and cash equivalents
Assets measured at fair value on a recurring basis
Cash and cash equivalents	0	0
Commercial paper \| Quoted prices in active markets for identical assets (level 1) \| Short-term investments
Assets measured at fair value on a recurring basis
Short-term investments	0	0
Commercial paper \| Significant other observable inputs (level 2) \| Cash and cash equivalents
Assets measured at fair value on a recurring basis
Cash and cash equivalents	10,796	38,268
Commercial paper \| Significant other observable inputs (level 2) \| Short-term investments
Assets measured at fair value on a recurring basis
Short-term investments	25,422	25,936
Commercial paper \| Significant unobservable inputs (level 3) \| Cash and cash equivalents
Assets measured at fair value on a recurring basis
Cash and cash equivalents	0	0
Commercial paper \| Significant unobservable inputs (level 3) \| Short-term investments
Assets measured at fair value on a recurring basis
Short-term investments	0	0
Corporate bonds \| Short-term investments
Assets measured at fair value on a recurring basis
Short-term investments	308,716	243,019
Corporate bonds \| Quoted prices in active markets for identical assets (level 1) \| Short-term investments
Assets measured at fair value on a recurring basis
Short-term investments	0	0
Corporate bonds \| Significant other observable inputs (level 2) \| Short-term investments
Assets measured at fair value on a recurring basis
Short-term investments	308,716	243,019
Corporate bonds \| Significant unobservable inputs (level 3) \| Short-term investments
Assets measured at fair value on a recurring basis
Short-term investments	0	0
US Treasuries \| Short-term investments
Assets measured at fair value on a recurring basis
Short-term investments	59,725
US Treasuries \| Quoted prices in active markets for identical assets (level 1) \| Short-term investments
Assets measured at fair value on a recurring basis
Short-term investments	59,725
US Treasuries \| Significant other observable inputs (level 2) \| Short-term investments
Assets measured at fair value on a recurring basis
Short-term investments	0
US Treasuries \| Significant unobservable inputs (level 3) \| Short-term investments
Assets measured at fair value on a recurring basis
Short-term investments	0
Mutual funds \| Short-term investments
Assets measured at fair value on a recurring basis
Short-term investments	4,880	4,232
Mutual funds \| Quoted prices in active markets for identical assets (level 1) \| Short-term investments
Assets measured at fair value on a recurring basis
Short-term investments	0	0
Mutual funds \| Significant other observable inputs (level 2) \| Short-term investments
Assets measured at fair value on a recurring basis
Short-term investments	4,880	4,232
Mutual funds \| Significant unobservable inputs (level 3) \| Short-term investments
Assets measured at fair value on a recurring basis
Short-term investments	0	0
Forward Contracts \| Prepaid expenses and other
Assets measured at fair value on a recurring basis
Foreign currency forward contracts	12	2
Forward Contracts \| Accrued and other current liabilities
Assets measured at fair value on a recurring basis
Foreign currency forward contracts	(43)	(352)
Forward Contracts \| Quoted prices in active markets for identical assets (level 1) \| Prepaid expenses and other
Assets measured at fair value on a recurring basis
Foreign currency forward contracts	0	0
Forward Contracts \| Quoted prices in active markets for identical assets (level 1) \| Accrued and other current liabilities
Assets measured at fair value on a recurring basis
Foreign currency forward contracts	0	0
Forward Contracts \| Significant other observable inputs (level 2) \| Prepaid expenses and other
Assets measured at fair value on a recurring basis
Foreign currency forward contracts	12	2
Forward Contracts \| Significant other observable inputs (level 2) \| Accrued and other current liabilities
Assets measured at fair value on a recurring basis
Foreign currency forward contracts	(43)	(352)
Forward Contracts \| Significant unobservable inputs (level 3) \| Prepaid expenses and other
Assets measured at fair value on a recurring basis
Foreign currency forward contracts	0	0
Forward Contracts \| Significant unobservable inputs (level 3) \| Accrued and other current liabilities
Assets measured at fair value on a recurring basis
Foreign currency forward contracts	0	$ 0
Currency Swap \| Accrued and other current liabilities
Assets measured at fair value on a recurring basis
Foreign currency forward contracts	(15,659)
Currency Swap \| Quoted prices in active markets for identical assets (level 1) \| Accrued and other current liabilities
Assets measured at fair value on a recurring basis
Foreign currency forward contracts	0
Currency Swap \| Significant other observable inputs (level 2) \| Accrued and other current liabilities
Assets measured at fair value on a recurring basis
Foreign currency forward contracts	(15,659)
Currency Swap \| Significant unobservable inputs (level 3) \| Accrued and other current liabilities
Assets measured at fair value on a recurring basis
Foreign currency forward contracts	$ 0

FAIR VALUE MEASUREMENTS - NARRATIVE (Details) - USD ($) $ in Thousands		12 Months Ended
	Jan. 31, 2017	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Debt Instrument [Line Items]
General and administrative		$ 247,828	$ 211,409	$ 192,452
Performance measurement period		24 months
1.00% Convertible Notes due 2018
Debt Instrument [Line Items]
Interest rate		1.00%
Estimated fair value of convertible notes		$ 36,799
Social Point
Debt Instrument [Line Items]
Contingent earn-out	$ 6,409
Other long-term liabilities \| Fair Value, Measurements, Recurring
Debt Instrument [Line Items]
Contingent consideration			$ (6,465)
Other long-term liabilities \| Fair Value, Measurements, Recurring \| Social Point
Debt Instrument [Line Items]
Contingent consideration		$ 0

SHORT-TERM INVESTMENTS (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Mar. 31, 2017
Schedule of Available-for-sale Securities [Line Items]
Cost or Amortized Cost	$ 617,318	$ 448,941
Gross Unrealized Gain	32	226
Gross Unrealized Loss	(1,944)	(235)
Fair Value	615,406	448,932
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Rolling Maturity [Abstract]
Due in 1 year or less	509,981
Due in 1-2 years	107,337
Total amortized cost	617,318
Available-for-sale Securities, Debt Maturities, Fair Value, Rolling Maturity [Abstract]
Due in 1 year or less	508,853
Due in 1-2 years	106,553
Total fair value	615,406
Bank time deposits
Schedule of Available-for-sale Securities [Line Items]
Cost or Amortized Cost	216,663	175,745
Gross Unrealized Gain	0	0
Gross Unrealized Loss	0	0
Fair Value	216,663	175,745
Corporate bonds
Schedule of Available-for-sale Securities [Line Items]
Cost or Amortized Cost	310,387	243,140
Gross Unrealized Gain	16	98
Gross Unrealized Loss	(1,687)	(219)
Fair Value	308,716	243,019
US Treasuries
Schedule of Available-for-sale Securities [Line Items]
Cost or Amortized Cost	59,970
Gross Unrealized Gain	0
Gross Unrealized Loss	(245)
Fair Value	59,725
Commercial paper
Schedule of Available-for-sale Securities [Line Items]
Cost or Amortized Cost	25,422	25,938
Gross Unrealized Gain	0	5
Gross Unrealized Loss	0	(7)
Fair Value	25,422	25,936
Mutual funds
Schedule of Available-for-sale Securities [Line Items]
Cost or Amortized Cost	4,876	4,118
Gross Unrealized Gain	16	123
Gross Unrealized Loss	(12)	(9)
Fair Value	$ 4,880	$ 4,232

DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Derivative [Line Items]
Forward contracts to sell foreign currencies	$ 67,580	$ 177,549
Forward contracts to purchase foreign currencies	4,359	9,170
Derivative instrument not designated as hedging instruments, gain (loss), net	19,473	$ 7,197	$ 144
Cash Flow Hedging \| Currency Swap
Derivative [Line Items]
Derivative, notional amount	$ 129

INVENTORY (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Mar. 31, 2017
Inventory Disclosure [Abstract]
Finished products	$ 13,940	$ 15,530
Parts and supplies	1,222	793
Inventory	15,162	16,323
Estimated product returns included in inventory	$ 373	$ 529

SOFTWARE DEVELOPMENT COSTS AND LICENSES (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Capitalized software development costs and licenses
Software development costs and licenses, Current	$ 33,284	$ 41,721
Software development costs and licenses, Non-current	639,369	381,910
Software development costs and licenses related to titles that have not been released	638,055	381,910
Amortization and impairment of software development costs and licenses
Amortization of software development costs and licenses	101,437	222,801	$ 117,506
Impairment of software development costs and licenses	1,060	20,166	22,671
Less: Portion representing stock-based compensation	(24,610)	(21,056)	(5,705)
Amortization and impairment, net of stock-based compensation	77,887	221,911	$ 134,472
Software development costs, internally developed
Capitalized software development costs and licenses
Software development costs and licenses, Current	19,338	28,959
Software development costs and licenses, Non-current	515,761	310,229
Software development costs, externally developed
Capitalized software development costs and licenses
Software development costs and licenses, Current	4,275	5,455
Software development costs and licenses, Non-current	122,270	71,407
Licenses
Capitalized software development costs and licenses
Software development costs and licenses, Current	9,671	7,307
Software development costs and licenses, Non-current	$ 1,338	$ 274

FIXED ASSETS, NET (Details) - USD ($) $ in Thousands	12 Months Ended
FIXED ASSETS, NET (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Fixed assets
Fixed assets, gross	$ 246,462	$ 188,517
Less: accumulated depreciation	(143,984)	(121,217)
Fixed assets, net	102,478	67,300
Depreciation expense	32,202	30,707	$ 28,800
Computer equipment
Fixed assets
Fixed assets, gross	87,926	75,281
Computer software
Fixed assets
Fixed assets, gross	47,702	41,527
Leasehold improvements
Fixed assets
Fixed assets, gross	88,762	56,758
Office equipment
Fixed assets
Fixed assets, gross	8,139	5,843
Furniture and fixtures
Fixed assets
Fixed assets, gross	13,933	9,108
Fixed Assets, Net
Fixed assets
Depreciation expense	$ 32,202	$ 30,629	$ 28,800

GOODWILL AND INTANGIBLE ASSETS, NET (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Change in the goodwill balance
Balance at the beginning of the period	$ 359,115	$ 217,080
Additions from immaterial acquisition	6,236	143,952
Goodwill, Other Increase (Decrease)	4,245
Currency translation adjustment	29,934	(1,917)
Balance at the end of the period	399,530	359,115
Components of the intangible assets subject to amortization
Gross Carrying Amount	154,396	113,627
Accumulated Amortization	(55,941)	(18,192)
Net Book Value	98,455	95,435
Intellectual property
Components of the intangible assets subject to amortization
Gross Carrying Amount	37,431	15,931
Accumulated Amortization	(13,616)	(12,943)
Net Book Value	23,815	2,988
Developed game technology
Components of the intangible assets subject to amortization
Gross Carrying Amount	67,133	54,421
Accumulated Amortization	(23,189)	(2,659)
Net Book Value	43,944	51,762
Analytics technology
Components of the intangible assets subject to amortization
Gross Carrying Amount	34,499	29,959
Accumulated Amortization	(8,050)	(999)
Net Book Value	26,449	28,960
User base
Components of the intangible assets subject to amortization
Gross Carrying Amount	10,454	9,079
Accumulated Amortization	(10,454)	(1,513)
Net Book Value	0	7,566
Branding and trade names
Components of the intangible assets subject to amortization
Gross Carrying Amount	4,879	4,237
Accumulated Amortization	(632)	(78)
Net Book Value	$ 4,247	$ 4,159

GOODWILL AND INTANGIBLE ASSETS, NET (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016	Jan. 31, 2017
Acquired Indefinite-lived Intangible Assets [Line Items]
Impairment of in-process research and development	$ 11,257	$ 0	$ 0
In Process Research and Development
Acquired Indefinite-lived Intangible Assets [Line Items]
Impairment of in-process research and development	11,257
Social Point \| In Process Research and Development
Acquired Indefinite-lived Intangible Assets [Line Items]
Intangible assets	5,226	$ 14,827		$ 14,700
Intellectual property
Acquired Indefinite-lived Intangible Assets [Line Items]
Finite lived intangible assets, period increase (decrease)	21,500
Developed game technology
Acquired Indefinite-lived Intangible Assets [Line Items]
Finite lived intangible assets, period increase (decrease)	$ 4,465

GOODWILL AND INTANGIBLE ASSETS, NET (Amortization of Intangible Assets) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Capitalized software development costs and licenses
Total amortization of intangible assets	$ 34,830	$ 6,816	$ 160
Cost of goods sold
Capitalized software development costs and licenses
Total amortization of intangible assets	19,719	4,252	160
Selling and marketing
Capitalized software development costs and licenses
Total amortization of intangible assets	8,107	1,497	0
Research and development
Capitalized software development costs and licenses
Total amortization of intangible assets	6,494	989	0
Depreciation and amortization
Capitalized software development costs and licenses
Total amortization of intangible assets	$ 510	$ 78	$ 0

GOODWILL AND INTANGIBLE ASSETS, NET (Estimated Future Amortization) (Details) $ in Thousands	Mar. 31, 2018 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
2019	$ 31,683
2020	28,223
2021	18,445
2022	10,774
2023	$ 4,295

ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Mar. 31, 2017
Liabilities, Current [Abstract]
Software development royalties	$ 600,512	$ 492,133
Business reorganization (see Note 20)	72,074	65,935
Compensation and benefits	57,499	44,843
Licenses	43,261	37,019
Deferred acquisition payments	25,000	25,000
Marketing and promotions	19,731	21,030
Other	96,671	64,915
Accrued expenses and other current liabilities	$ 914,748	$ 750,875

DEBT - CREDIT AGREEMENT (Details)	1 Months Ended		12 Months Ended
DEBT - CREDIT AGREEMENT (Details)	Dec. 31, 2017 USD ($)	Apr. 30, 2016 USD ($)	Mar. 31, 2018 USD ($)	Mar. 31, 2017 USD ($)	Mar. 31, 2016 USD ($)
Credit Agreement
Credit Agreement
Maximum borrowing capacity	$ 100,000,000
Amount of additional borrowings by which maximum borrowing capacity may be increased	$ 100,000,000
Outstanding borrowings			$ 0	$ 0
Credit Agreement Availability
Minimum liquidity level allowing unrestricted access to the Credit Agreement			300,000,000
Available borrowings			98,335,000	98,320,000
Outstanding letters of credit			1,664,000	1,664,000
Interest expense and fees			$ 441,000	$ 441,000	$ 438,000
Trailing period for measurement of interest coverage ratio		12 months
Maximum liquidity level triggering the requirement to maintain an interest coverage ratio of one to one		$ 30,000,000
Credit Agreement \| Minimum
Credit Agreement
Monthly fee on unused available balance (as a percent)	0.25%
Credit Agreement Availability
Interest coverage ratio		1
Credit Agreement \| Maximum
Credit Agreement
Monthly fee on unused available balance (as a percent)	0.375%
Credit Agreement \| Base rate
Credit Agreement
Interest rate at end of period (as a percent)			4.75%
Credit Agreement \| Base rate \| Minimum
Credit Agreement
Interest rate added to base rate (as a percent)	0.25%
Credit Agreement \| Base rate \| Maximum
Credit Agreement
Interest rate added to base rate (as a percent)	0.75%
Credit Agreement \| LIBOR
Credit Agreement
Interest rate at end of period (as a percent)			1.88%
Interest rate, variable rate basis			LIBOR
Credit Agreement \| LIBOR \| Minimum
Credit Agreement
Interest rate added to base rate (as a percent)	1.25%
Credit Agreement \| LIBOR \| Maximum
Credit Agreement
Interest rate added to base rate (as a percent)	1.75%
Letter of Credit
Credit Agreement
Maximum borrowing capacity	$ 5,000,000

DEBT - 1.75 CONVERTIBLE NOTES (Details)	Mar. 31, 2018
1.75% Convertible Notes due 2016
Debt Instrument [Line Items]
Interest rate	1.75%

DEBT - CONVERTIBLE DEBT INFORMATION (Details) - USD ($)	Mar. 31, 2018	Mar. 31, 2017	Jun. 18, 2013
1.75% Convertible Notes due 2016
Debt Instrument [Line Items]
Interest rate	1.75%
1.00% Convertible Notes due 2018
Debt Instrument [Line Items]
Interest rate	1.00%
Additional paid-in capital	$ 35,784,000	$ 35,784,000
Principal amount of Convertible Notes	8,160,000	268,149,000
Unamortized discount of the liability component	89,000	15,751,000
Carrying amount of debt issuance costs	3,000	469,000
Net carrying amount of Convertible Notes	$ 8,068,000	$ 251,929,000
Convertible Debt \| 1.00% Convertible Notes due 2018
Debt Instrument [Line Items]
Interest rate	1.00%		1.00%
Principal amount of Convertible Notes			$ 250,000,000

DEBT - INTEREST EXPENSE COMPONENTS (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016	Jun. 18, 2013
Debt Instrument [Line Items]
Non-cash amortization of discount on Convertible Notes	$ 15,662	$ 21,222	$ 23,457
Amortization of debt issuance costs	$ 578	1,227	1,567
1.75% Convertible Notes due 2016
Debt Instrument [Line Items]
Interest rate	1.75%
1.00% Convertible Notes due 2018
Debt Instrument [Line Items]
Interest rate	1.00%
Convertible Debt \| 1.00% Convertible Notes due 2018
Debt Instrument [Line Items]
Interest rate	1.00%			1.00%
Cash interest expense (coupon interest expense)	$ 539	2,784	2,875
Non-cash amortization of discount on Convertible Notes	15,662	14,221	12,085
Amortization of debt issuance costs	466	453	443
Total interest expense related to Convertible Notes	$ 16,667	$ 17,458	$ 15,403

DEBT - 1.00 CONVERTIBLE NOTES (Details) $ / shares in Units, label in Thousands			12 Months Ended
	Jul. 17, 2013 USD ($) label	Jun. 18, 2013 USD ($) $ / shares	Mar. 31, 2018 USD ($)	Mar. 31, 2017 USD ($)	Mar. 31, 2016 USD ($)
Convertible Notes
Interest and other, net			$ 1,048,000	$ (15,690,000)	$ (30,205,000)
1.00% Convertible Notes due 2018
Convertible Notes
Principal amount at issuance			$ 8,160,000	268,149,000
Interest rate			1.00%
Estimated fair value of convertible notes			$ 36,799,000
Convertible Debt \| 1.00% Convertible Notes due 2018
Convertible Notes
Principal amount at issuance		$ 250,000,000
Interest rate		1.00%	1.00%
Percentage of par value at which debt was issued		98.50%
Proceeds from issuance of debt	$ 283,188,000	$ 246,250,000
Period of overallotment option to purchase additional amount of debt granted to underwriters		30 days
Amount pertaining to exercise of over-allotment of debt by underwriters	$ 37,500,000
Initial conversion rate of common stock per $1000 of principal amount of Convertible Notes (in shares)		46.4727
Principal amount used for debt instrument conversion ratio		$ 1,000
Initial conversion price of convertible notes into common stock (in dollars per share) \| $ / shares		$ 21.52
Number of shares to be converted into common stock \| label	13,361
Extinguishment of debt			$ 259,989,000
Interest and other, net			4,900,000
The value by which Convertible Notes exceed the principal value			$ 28,639,000	$ 470,456,000
Convertible Debt \| 1.00% Convertible Notes due 2018 \| Maximum
Convertible Notes
Additional amount of debt for purchase of which overallotment option is granted to underwriters		$ 37,500,000

EARNINGS PER SHARE ("EPS") (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Computation of Basic (loss) earnings per share:
Net income (loss)	$ 90,853	$ 25,140	$ (2,736)	$ 60,276	$ 99,280	$ (29,842)	$ 36,432	$ (38,567)	$ 173,533	$ 67,303	$ (8,302)
Less: net income allocated to participating securities									(159)	(1,275)	0
Net (loss) income for basic (loss) earnings per share calculation									$ 173,374	$ 66,028	$ (8,302)
Total weighted average shares outstanding - basic (in shares)									110,210	91,921	83,417
Less: weighted average participating shares outstanding (in shares)									(101)	(1,741)	0
Weighted average common shares outstanding - basic (in shares)									110,109	90,180	83,417
Basic earnings (loss) per share (in dollars per share)	$ 0.80	$ 0.22	$ (0.03)	$ 0.57	$ 0.97	$ (0.33)	$ 0.42	$ (0.46)	$ 1.57	$ 0.73	$ (0.10)
Computation of Diluted (loss) earnings per share:
Net income (loss)	$ 90,853	$ 25,140	$ (2,736)	$ 60,276	$ 99,280	$ (29,842)	$ 36,432	$ (38,567)	$ 173,533	$ 67,303	$ (8,302)
Less: net income allocated to participating securities									(155)	(1,246)	0
Net (loss) income for diluted (loss) earnings per share calculation									$ 173,378	$ 66,057	$ (8,302)
Weighted average common shares outstanding—basic									110,109	91,921	83,417
Total weighted average shares outstanding - basic (in shares)									110,210	91,921	83,417
Add: dilutive effect of common stock equivalents (in shares)									2,755	2,152	0
Weighted average common shares outstanding—diluted (in shares)									112,864	94,073	83,417
Less: weighted average participating shares outstanding (in shares)									(101)	(1,741)	0
Weighted average common shares outstanding - diluted (in shares)									112,763	92,332	83,417
Diluted earnings (loss) per share (in dollars per share)	$ 0.77	$ 0.21	$ (0.03)	$ 0.56	$ 0.89	$ (0.33)	$ 0.39	$ (0.46)	$ 1.54	$ 0.72	$ (0.10)
Restricted stock
Computation of Diluted (loss) earnings per share:
Antidilutive shares excluded from calculation of EPS											6,405

COMMITMENTS AND CONTINGENCIES - ANNUAL MINIMUM OBLIGATIONS (Details) $ in Thousands	Mar. 31, 2018 USD ($)
Operating Leases
2019	$ 39,113
2020	29,620
2021	23,092
2022	21,665
2023	19,571
Thereafter	62,476
Total	195,537
Purchase Obligations
2019	21,549
2020	7,046
2021	1,629
2022	0
2023	0
Thereafter	0
Total	30,224
Convertible Notes Interest
2019	20
2020	0
2021	0
2022	0
2023	0
Thereafter	0
Total	20
Convertible Notes
2019	8,160
2020	0
2021	0
2022	0
2023	0
Thereafter	0
Total	8,160
2019	234,809
2020	94,260
2021	67,200
2022	47,186
2023	29,321
Thereafter	67,726
Total	540,502
Software Development and licensing
Unrecorded Unconditional Purchase Obligation
2019	116,242
2020	53,534
2021	28,999
2022	21,748
2023	6,250
Thereafter	5,250
Total	232,023
Marketing
Unrecorded Unconditional Purchase Obligation
2019	49,725
2020	4,060
2021	13,480
2022	3,773
2023	3,500
Thereafter	0
Total	$ 74,538

COMMITMENTS AND CONTINGENCIES - CONTINGENT CONSIDERATION (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Commitments and Contingencies Disclosure [Abstract]
Rent expense	$ 25,301	$ 19,545	$ 18,032

COMMITMENTS AND CONTINGENCIES - SAVINGS PLANS AND INCOME TAXES (Details) - USD ($) $ in Thousands		12 Months Ended
	Apr. 12, 2016	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Commitments and Contingencies Disclosure [Abstract]
Matching contribution expense incurred by the Company		$ 9,592	$ 8,018	$ 8,348
Legal and Other Proceedings
Damages claimed	$ 150,000

INCOME TAXES - Narrative (Details) $ in Thousands	12 Months Ended
INCOME TAXES - Narrative (Details) $ in Thousands	Mar. 31, 2018 USD ($)
Income Tax Disclosure [Abstract]
Tax impact from TCJA	$ 18,078
Increased income tax expense, transition tax	26,649
Decrease to deferred tax asset income tax expense	(47,677)
Valuation allowance (decrease)	(39,769)
Tax benefit after remeasurement of intangibles	7,908
Tax benefit from remeasurement of deferred tax liability	$ 6,202

INCOME TAXES - CURRENT INCOME TAX (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Components of (loss) income before income taxes
Domestic	$ 136,239	$ 86,050	$ (94,174)
Foreign	386	(9,085)	55,824
Income (loss) before income taxes	136,625	76,965	(38,350)
Current:
U.S. federal	(7,327)	19,271	792
U.S. state and local	(1,266)	2,521	938
Foreign	4,208	(13,012)	(31,508)
Total current income taxes	(4,385)	8,780	(29,778)
Deferred:
U.S. federal	(13,530)	969	1,211
U.S. state and local	195	2,395	(231)
Foreign	(19,188)	(2,482)	(1,250)
Total deferred income taxes	(32,523)	882	(270)
Provision (benefit from) for income taxes	$ (36,908)	$ 9,662	$ (30,048)
Reconciliation of effective tax rate to the U.S. statutory federal income tax rate
U.S. federal statutory rate	31.60%	35.00%	35.00%
State and local taxes, net of U.S. federal benefit	0.50%	4.90%	1.60%
Foreign tax rate differential(1)	(6.90%)	(1.40%)	25.80%
Foreign earnings	1.20%	5.50%	(3.70%)
Tax credits (2)	(16.50%)	(45.80%)	98.70%
Excess tax benefits from stock-based compensation (3)	(38.90%)	0.00%	0.00%
One-time transition tax (4)	19.50%	0.00%	0.00%
Domestic production deduction	(2.80%)	(2.50%)	0.00%
Valuation allowance—domestic (5)	(0.50%)	10.10%	(77.80%)
Valuation allowance—foreign	(2.50%)	0.10%	10.40%
Change in reserves	(11.00%)	2.90%	(7.00%)
Other	(0.70%)	3.70%	(4.60%)
Effective tax rate	(27.00%)	12.50%	78.40%

- DEFERRED TAXES (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Mar. 31, 2017
Deferred tax assets:
Accrued compensation expense	$ 94,919	$ 131,305
Equity-based compensation	78,293	25,048
Deferred revenue	42,426	41,977
Domestic net operating loss carryforward	35,378	20,131
Tax credit carryforward	64,175	52,639
Business reorganization	16,369	24,103
Sales returns and allowances (including bad debt)	575	3,942
Deferred rent	5,729	8,865
Other	1,145	4,045
Total deferred tax assets	339,009	312,055
Less: Valuation allowance	(195,640)	(184,085)
Net deferred tax assets	143,369	127,970
Deferred tax liabilities:
Capitalized software and depreciation	(118,119)	(120,715)
Convertible debt	(13)	(5,219)
Intangible amortization	(24,651)	(38,068)
Other	(4,534)	0
Total deferred tax liabilities	(147,317)	(164,002)
Net deferred tax liability	(3,948)	(36,032)
Other long-term liabilities
Deferred tax liabilities:
Net deferred tax liability	$ (3,948)	$ (36,032)

- LOSS CARRYFORWARDS (Details) - USD ($)	12 Months Ended
- LOSS CARRYFORWARDS (Details) - USD ($)	Mar. 31, 2018	Mar. 31, 2017
Operating loss carryforwards
Total amount of undistributed earnings of foreign subsidiaries	$ 314,800,000	$ 162,800,000
Provision for foreign withholding taxes or U.S. income taxes, which may become payable if undistributed earnings of foreign subsidiaries are repatriated	0
Gross unrecognized tax benefits including interest and penalties	128,510,000	120,198,000
Gross unrealized tax benefits, which would affect effective tax rate, if realized	22,805,000	$ 36,940,000
Domestic
Operating loss carryforwards
Net operating loss carryforwards	50,136,000
Domestic \| Expire in 2022
Operating loss carryforwards
Net operating loss carryforwards	1,676,000
Domestic \| Expire from 2023 to 2027
Operating loss carryforwards
Net operating loss carryforwards	21,700,000
Domestic \| Expire from 2028 to 2032
Operating loss carryforwards
Net operating loss carryforwards	22,400,000
Domestic \| Expire in 2037
Operating loss carryforwards
Net operating loss carryforwards	4,321,000
Foreign
Operating loss carryforwards
Net operating loss carryforwards	209,238,000
Foreign \| Expire in 2022
Operating loss carryforwards
Net operating loss carryforwards	118,000
Foreign \| Expire in 2020
Operating loss carryforwards
Net operating loss carryforwards	$ 192,485,000

INCOME TAXES - CREDIT CARRYFORWARDS (Details) - Domestic Tax Authority $ in Thousands	Mar. 31, 2018 USD ($)
Tax Credit Carryforward [Line Items]
Tax credit carryforward	$ 183,982
Expire 2031 to 2036
Tax Credit Carryforward [Line Items]
Tax credit carryforward	$ 104,474

INCOME TAXES - UNCERTAIN TAX POSITIONS (Details) - USD ($)	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Income Tax Disclosure [Abstract]
Increase in interest and penalties	$ 2,363,000	$ 877,000	$ 1,098,000
Gross amount of interest and penalties accrued	6,453,000	4,090,000
Possible decrease in unrecognized tax benefits	8,400,000
Aggregate changes to the liability for gross uncertain tax position, excluding interest and penalties
Balance, beginning of period	116,085,000	52,799,000	40,591,000
Additions:
Current year tax positions	23,007,000	65,669,000	12,208,000
Prior year tax positions	7,406,000	5,086,000	0
Reduction of prior year tax positions	(436,000)	0	0
Lapse of statute of limitations	(24,006,000)	(7,469,000)	0
Balance, end of period	$ 122,056,000	$ 116,085,000	$ 52,799,000

STOCK-BASED COMPENSATION - 2009 PLAN (Details) - 2009 Plan - shares	Mar. 31, 2018	Apr. 30, 2009
Stock-based compensation
Number of shares issuable		7,596,000
Number of new shares available for grant	6,329,000

STOCK-BASED COMPENSATION - COMPENSATION EXPENSE (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Stock-based compensation expense
Stock-based compensation expense	$ 116,349	$ 81,879	$ 69,996
Capitalized stock-based compensation expense	90,914	74,717	30,367
Cost of goods sold
Stock-based compensation expense
Stock-based compensation expense	24,610	21,056	15,323
Selling and marketing
Stock-based compensation expense
Stock-based compensation expense	13,258	9,963	9,425
General and administrative
Stock-based compensation expense
Stock-based compensation expense	58,037	42,908	40,322
Research and development
Stock-based compensation expense
Stock-based compensation expense	18,020	7,952	4,926
Business reorganization
Stock-based compensation expense
Stock-based compensation expense	$ 2,424	$ 0	$ 0

STOCK-BASED COMPENSATION - NARRATIVE (Details) - USD ($) $ / shares in Units, $ in Thousands		1 Months Ended	12 Months Ended
	Apr. 01, 2014	Sep. 30, 2017	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Management Agreement
Performance measurement period			24 months
Incremental compensation cost		$ 112,789
Reversal of forfeiture awards			$ (17,069)
Reversal of capitalized costs			$ (53,779)
Zelnick Media Corporation \| 2014 Management Agreement
Management Agreement
Granted (in shares)			229,387	372,935
Restricted stock
Management Agreement
Award vesting period			3 years
Granted (in shares)			8,039,000
Nonvested shares (in shares)			7,397,000	4,259,000
Vested (in shares)			3,272,000
Forfeited (in shares)			1,629,000
Target vesting			100.00%
Future unrecognized compensation cost, net of estimated forfeitures			$ 640,672
Weighted average remaining contractual terms			3 years
Time Based
Management Agreement
Intrinsic value (in dollars per share)			$ 106.28	$ 49.43	$ 33.74
Time Based \| Zelnick Media Corporation
Management Agreement
Intrinsic value (in dollars per share)			78.53	36.37	27.65
Market-based restricted shares \| Zelnick Media Corporation
Management Agreement
Restricted stock marter performance measure - industrial index	50.00%
Options granted in period (in dollars per shares)			185.66	51.92	58.45
Employee Market-Based
Management Agreement
Options granted in period (in dollars per shares)			$ 141.78	$ 63.60	43.66
2014 Management agreement \| Zelnick Media Corporation
Management Agreement
Units tied to incentive program	50.00%
2014 Management agreement \| Restricted stock
Management Agreement
Non-vested restricted stock units (in shares)			602,217	898,526
2014 Management agreement \| Market-based restricted shares \| Zelnick Media Corporation
Management Agreement
Restricted stock market performance measure - composite index	75.00%
Vesting requirement measurement period	2 years
New IP incentive program \| 2014 Management agreement \| Zelnick Media Corporation
Management Agreement
Units tied to incentive program	50.00%
Major IP incentive program \| 2014 Management agreement \| Zelnick Media Corporation
Management Agreement
Units tied to incentive program	50.00%
New IP and Major IP incentive programs \| 2014 Management agreement \| Zelnick Media Corporation
Management Agreement
Performance measurement period	2 years
Performance Based Awards
Management Agreement
Options granted in period (in dollars per shares)			$ 102.57	$ 0	0
Performance Based Awards \| Zelnick Media Corporation
Management Agreement
Options granted in period (in dollars per shares)			$ 97.78	$ 59.27	$ 37.67
Performance and market-based restricted stock awards
Management Agreement
Number of shares granted eligible to vest maximum			512,266
Number of shares outstanding eligible to vest maximum			1,398,626
Fair values of restricted stock units vested			$ 268,570	$ 137,130	$ 123,854
Liability awards
Management Agreement
Shares issued under stock based awards			5,550,000
Other long-term liabilities
Management Agreement
Reclassification of equity		(74,707)
Additional Paid-in Capital
Management Agreement
Reclassification of equity		74,707
Software Development Cost And Licenses
Management Agreement
Incremental compensation cost		84,176
Software Development Costs and Royalties
Management Agreement
Incremental compensation cost		23,251
Research and Development
Management Agreement
Incremental compensation cost		$ 5,361

STOCK-BASED COMPENSATION - 2014 MANAGEMENT AGREEMENT (Details) - 2014 Management Agreement - Zelnick Media Corporation - shares	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Stock-based compensation
Granted (in shares)	229,387	372,935
Time-based
Stock-based compensation
Granted (in shares)	66,122	107,551
Market-based
Stock-based compensation
Granted (in shares)	122,370	199,038
New IP
Stock-based compensation
Granted (in shares)	20,501	33,174
Major IP
Stock-based compensation
Granted (in shares)	20,394	33,172
Total-Performance-based
Stock-based compensation
Granted (in shares)	40,895	66,346

- STOCK ACTIVITY (Details) - USD ($) $ / shares in Units, shares in Thousands	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Restricted stock
Shares
Non-vested restricted stock units at the beginning of the year (in shares)	4,259
Granted (in shares)	8,039
Vested (in shares)	(3,272)
Forfeited (in shares)	(1,629)
Non-vested restricted stock units at the end of the year (in shares)	7,397	4,259
Weighted Average Fair Value on Grant Date
Non-vested restricted stock at the beginning of the year (in dollars per share)	$ 32.93
Granted (in dollars per share)	101.72
Vested (in dollars per share)	28.67
Forfeited (in dollars per share)	107.05
Non-vested restricted stock at the end of the year (in dollars per share)	$ 90.70	$ 32.93
Employee Market-Based
Weighted-average assumptions
Risk-free interest rate	1.40%	0.90%	0.60%
Expected stock price volatility	28.40%	31.20%	33.90%
Expected service period (years)	1 year 6 months	1 year 6 months	1 year 10 months 24 days
Dividends	$ 0	$ 0	$ 0
Non-Employee Market-Based
Weighted-average assumptions
Risk-free interest rate	2.10%	0.70%	0.40%
Expected stock price volatility	35.50%	30.10%	32.20%
Expected service period (years)	1 year	1 year	1 year 1 month 6 days
Dividends	$ 0	$ 0	$ 0

SHARE REPURCHASE PROGRAM (Details) - USD ($) $ in Thousands	2 Months Ended	12 Months Ended
SHARE REPURCHASE PROGRAM (Details) - USD ($) $ in Thousands	May 17, 2018	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
SHARE REPURCHASE
Number of shares authorized to be repurchased		14,217,683
Repurchased common stock		$ 154,792		$ 26,552
Common Stock \| Share Repurchase Program
SHARE REPURCHASE
Repurchased common stock (in shares)		1,512,557	0	953,647
Repurchased common stock		$ 154,808	$ 0	$ 26,552
Commissions		$ 16	$ 0		$ 10
Shares repurchased under the share repurchase program		6,683,887
Number of shares of common stock remaining available for repurchase under the entity's share repurchase authorization		7,533,796
Subsequent Event \| Common Stock \| Share Repurchase Program
SHARE REPURCHASE
Repurchased common stock (in shares)	1,597,216
Repurchased common stock	$ 153,515
Commissions	$ 16
Number of shares of common stock remaining available for repurchase under the entity's share repurchase authorization	5,936,580

SEGMENT AND GEOGRAPHIC INFORMATION - Narrative (Details)	12 Months Ended
	Mar. 31, 2018 segment
Segment Reporting [Abstract]
Number of reportable segments	1

SEGMENT AND GEOGRAPHIC INFORMATION - REVENUE BY GEOGRAPHIC REGION (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Net revenue by geographic region:
Total net revenue	$ 450,274	$ 480,840	$ 443,562	$ 418,216	$ 571,555	$ 476,474	$ 420,167	$ 311,552	$ 1,792,892	$ 1,779,748	$ 1,413,698
United States
Net revenue by geographic region:
Total net revenue									1,052,313	999,128	742,963
Europe
Net revenue by geographic region:
Total net revenue									531,514	515,696	449,577
Asia Pacific
Net revenue by geographic region:
Total net revenue									111,223	157,183	120,629
Canada and Latin America
Net revenue by geographic region:
Total net revenue									$ 97,842	$ 107,741	$ 100,529

SEGMENT AND GEOGRAPHIC INFORMATION - REVENUE BY PRODUCT PLATFORM (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Net revenue by product platform:
Total net revenue	$ 450,274	$ 480,840	$ 443,562	$ 418,216	$ 571,555	$ 476,474	$ 420,167	$ 311,552	$ 1,792,892	$ 1,779,748	$ 1,413,698
Console
Net revenue by product platform:
Total net revenue									1,463,306	1,440,724	1,167,623
PC and other
Net revenue by product platform:
Total net revenue									$ 329,586	$ 339,024	$ 246,075

SEGMENT AND GEOGRAPHIC INFORMATION - REVENUE BY DISTRIBUTION CHANNEL (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Net revenue by distribution channel:
Net revenue	$ 450,274	$ 480,840	$ 443,562	$ 418,216	$ 571,555	$ 476,474	$ 420,167	$ 311,552	$ 1,792,892	$ 1,779,748	$ 1,413,698
Digital online
Net revenue by distribution channel:
Net revenue									1,130,946	921,734	697,658
Physical retail and other
Net revenue by distribution channel:
Net revenue									$ 661,946	$ 858,014	$ 716,040

INTEREST AND OTHER, NET (Details) - USD ($) $ in Thousands	12 Months Ended
INTEREST AND OTHER, NET (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Other Income and Expenses [Abstract]
Interest expense, net	$ (1,005)	$ (21,700)	$ (29,239)
Foreign currency exchange (loss) gain	(3,038)	4,990	(1,407)
Other	5,091	1,020	441
Interest and other, net	$ 1,048	$ (15,690)	$ (30,205)

ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance	$ (47,142)	$ (37,896)
Other comprehensive (loss) income before reclassifications	25,942	(9,255)
Amounts reclassified from accumulated other comprehensive income (loss)	7,506	9
Tax effect on cross-currency swap	(2,038)	0	$ 0
Balance	(15,732)	(47,142)	(37,896)
Foreign currency translation adjustments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance	(47,666)	(38,580)
Other comprehensive (loss) income before reclassifications	43,379	(9,086)
Amounts reclassified from accumulated other comprehensive income (loss)	0	0
Balance	(4,287)	(47,666)	(38,580)
Unrealized gain (loss) on derivative instruments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance	600	600
Other comprehensive (loss) income before reclassifications	0	0
Amounts reclassified from accumulated other comprehensive income (loss)	0	0
Balance	600	600	600
Unrealized gain (loss) on cross-currency swap
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance	0	0
Other comprehensive (loss) income before reclassifications	(15,659)	0
Amounts reclassified from accumulated other comprehensive income (loss)	7,506	0
Tax effect on cross-currency swap	(2,038)
Balance	(10,191)	0	0
Unrealized gain (loss) on available- for-sales securities
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance	(76)	84
Other comprehensive (loss) income before reclassifications	(1,778)	(169)
Amounts reclassified from accumulated other comprehensive income (loss)	0	9
Balance	$ (1,854)	$ (76)	$ 84

BUSINESS REORGANIZATION (Details) $ in Thousands	12 Months Ended
BUSINESS REORGANIZATION (Details) $ in Thousands	Mar. 31, 2018 USD ($) location	Mar. 31, 2017 USD ($)	Mar. 31, 2016 USD ($)
Restructuring Cost and Reserve [Line Items]
Reorganization expenses incurred	$ 14,742	$ 0	$ 71,285
Number of locations reorganized \| location	1
Number of locations closed \| location	2
Reorganizing amounts paid	$ 3,895	5,350
Remaining accrual	72,074	$ 65,935
Accrued Liabilities
Restructuring Cost and Reserve [Line Items]
Remaining accrual	6,139
Other long-term liabilities
Restructuring Cost and Reserve [Line Items]
Remaining accrual	$ 4,708

SUPPLEMENTARY FINANCIAL INFORMATION (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Valuation allowance for deferred income taxes
Movement in valuation and qualifying accounts
Beginning Balance	$ 184,085	$ 170,574	$ 133,468
Additions	11,555	13,511	37,106
Deductions	0	0	0
Other	0	0	0
Ending Balance	195,640	184,085	170,574
Price protection, sales returns and other allowances
Movement in valuation and qualifying accounts
Beginning Balance	65,114	45,153	69,305
Additions	59,674	127,744	64,498
Deductions	(74,936)	(100,934)	(86,622)
Other	3,191	(6,849)	(2,028)
Ending Balance	53,043	65,114	45,153
Price protection
Movement in valuation and qualifying accounts
Additions	27,088	65,336	36,546
Other sales allowances
Movement in valuation and qualifying accounts
Additions	31,428	45,850	23,073
Returns
Movement in valuation and qualifying accounts
Additions	1,158	16,558	4,879
Allowance for doubtful accounts
Movement in valuation and qualifying accounts
Beginning Balance	1,369	399	1,166
Additions	0	974	0
Deductions	(122)	(4)	(767)
Other	0	0	0
Ending Balance	1,247	1,369	399
Total accounts receivable allowances
Movement in valuation and qualifying accounts
Beginning Balance	66,483	45,552	70,471
Additions	59,674	128,718	64,498
Deductions	(75,058)	(100,938)	(87,389)
Other	3,191	(6,849)	(2,028)
Ending Balance	$ 54,290	$ 66,483	$ 45,552

QUARTERLY FINANCIAL INFORMATION (UNAUDITED) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Quarterly Financial Information Disclosure [Abstract]
Net revenue	$ 450,274	$ 480,840	$ 443,562	$ 418,216	$ 571,555	$ 476,474	$ 420,167	$ 311,552	$ 1,792,892	$ 1,779,748	$ 1,413,698
Gross profit	261,063	212,857	197,014	223,647	256,657	165,399	214,562	120,171	894,581	756,789	599,825
Income (loss) from operations	87,825	8,852	(11,319)	50,219	111,503	(28,409)	47,194	(38,983)	135,577	91,305	(10,828)
Net income (loss)	$ 90,853	$ 25,140	$ (2,736)	$ 60,276	$ 99,280	$ (29,842)	$ 36,432	$ (38,567)	$ 173,533	$ 67,303	$ (8,302)
Earnings (loss) per share:
Basic earnings (loss) per share (in dollars per share)	$ 0.80	$ 0.22	$ (0.03)	$ 0.57	$ 0.97	$ (0.33)	$ 0.42	$ (0.46)	$ 1.57	$ 0.73	$ (0.10)
Diluted earnings (loss) per share (in dollars per share)	$ 0.77	$ 0.21	$ (0.03)	$ 0.56	$ 0.89	$ (0.33)	$ 0.39	$ (0.46)	$ 1.54	$ 0.72	$ (0.10)

ACQUISITIONS - NARRATIVE (Details) - USD ($) $ in Thousands		12 Months Ended
ACQUISITIONS - NARRATIVE (Details) - USD ($) $ in Thousands	Jan. 31, 2017	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Business Acquisition [Line Items]
Cash		$ 9,401	$ 130,669	$ 0
Issuance of common stock in connection with acquisition (in shares)	1,480,168
Required minimum employment period	3 years
Deferred acquisition payments		$ 25,000	25,000
Performance measurement period		24 months
Contingent consideration		$ 0
Goodwill increase		6,236	$ 143,952
Social Point
Business Acquisition [Line Items]
Cash	$ 175,000
Contingent earn out, cash and stock	25,900
Consideration transferred	238,736
Contingent earn-out	$ 6,409
Transaction costs		1,915
Goodwill increase		$ 4,245
Minimum \| Social Point
Business Acquisition [Line Items]
Performance measurement period		12 months
Maximum \| Social Point
Business Acquisition [Line Items]
Performance measurement period		24 months

ACQUISITIONS - ACQUISITION (Details) - USD ($) $ in Thousands		12 Months Ended
	Jan. 31, 2017	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Business Acquisition [Line Items]
Cash		$ 9,401	$ 130,669	$ 0
Contingent consideration		$ 0
Social Point
Business Acquisition [Line Items]
Cash	$ 175,000
Common stock (1,071,739 shares)	57,327
Contingent earn-out	6,409
Total	$ 238,736
Issuance of common stock in connection with acquisition (in shares)	1,071,739

ACQUISITIONS - ASSET AND LIABILITIES ASSUMED (Details) - USD ($) $ in Thousands	Jan. 31, 2017	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Business Acquisition [Line Items]
Goodwill		$ 399,530	$ 359,115	$ 217,080
Social Point
Business Acquisition [Line Items]
Tangible net assets (liabilities assumed)	$ (20,625)
Goodwill	147,811
Total	238,736
Developed game technology \| Social Point
Business Acquisition [Line Items]
Intangible Assets	$ 53,950
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	4 years
In Process Research and Development \| Social Point
Business Acquisition [Line Items]
Intangible Assets	$ 14,700	$ 5,226	$ 14,827
Analytics technology \| Social Point
Business Acquisition [Line Items]
Intangible Assets	$ 29,700
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	5 years
User base \| Social Point
Business Acquisition [Line Items]
Intangible Assets	$ 9,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	1 year
Branding and trade names \| Social Point
Business Acquisition [Line Items]
Intangible Assets	$ 4,200
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	9 years