CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands		12 Months Ended
		Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020
Operating activities:
Net income		$ 418,022	$ 588,886	$ 404,459
Adjustments to reconcile net income to net cash provided by operating activities:
Amortization and impairment of software development costs and licenses		153,279	144,263	167,925
Stock-based compensation		182,969	110,472	257,881
Noncash lease expense		34,511	30,553	21,037
Amortization of intellectual property		64,817	32,241	20,990
Depreciation		61,196	56,309	47,628
Impairment of software development costs and licenses		70,611	39,073	0
Amortization of debt issuance costs		6,525	0	0
Deferred income taxes		8,104	10,631	(3,486)
Gain on long-term investments, net		(6,015)	(41,588)	0
Other, net		16,243	5,515	9,074
Changes in assets and liabilities:
Accounts receivable		(17,857)	47,195	(195,484)
Inventory		4,106	2,503	8,489
Software development costs and licenses		(457,556)	(260,352)	(48,434)
Prepaid expenses, other current and other non-current assets		(207,559)	(89,290)	(280,854)
Deferred revenue		(30,946)	152,466	(55,460)
Deferred cost of goods sold		3,139	4,768	32,180
Accounts payable, accrued expenses and other liabilities		(45,605)	78,673	299,733
Net cash provided by operating activities		257,984	912,318	685,678
Investing activities:
Change in bank time deposits		446,965	(387,762)	196,720
Proceeds from available-for-sale securities		779,940	546,287	400,635
Purchases of available-for-sale securities		(756,266)	(824,477)	(499,991)
Purchases of fixed assets		(158,642)	(68,923)	(53,384)
Proceeds from sale of long-term investment		0	47,472	0
Purchase of long-term investments		(12,272)	(16,852)	(27,891)
Business acquisitions, net of cash acquired		(161,331)	(102,469)	(12,040)
Other		822	0	0
Net cash provided by (used in) investing activities		139,216	(806,724)	4,049
Financing activities:
Tax payment related to net share settlements on restricted stock awards		(64,074)	(71,552)	(87,968)
Repurchase of common stock		(200,012)	0	0
Issuance of common stock		19,657	14,214	10,515
Cost of debt		(12,150)	0	0
Other		(234)	0	0
Net cash used in financing activities		(256,813)	(57,338)	(77,453)
Effects of foreign currency exchange rates on cash, cash equivalents, and restricted cash and cash equivalents		(5,303)	18,599	(10,868)
Net change in cash, cash equivalents, and restricted cash and cash equivalents		135,084	66,855	601,406
Cash, cash equivalents, and restricted cash and cash equivalents, beginning of year	[1]	2,060,247	1,993,392	1,391,986
Cash, cash equivalents, and restricted cash equivalents, end of year	[1]	2,195,331	2,060,247	1,993,392
Supplemental data:
Interest paid		0	1,862	4,750
Income taxes paid		$ 30,951	$ 70,749	$ 27,998

[1] Cash, cash equivalents and restricted cash and cash equivalents shown on our Consolidated Statements of Cash Flow includes amounts in the Cash and cash equivalents, Restricted cash and cash equivalents, and Long-term restricted cash and cash equivalents on our Consolidated Balance Sheet.