Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Operating Activities
Net income	$ 307,499	$ 504,446	$ 681,813
Adjustments to reconcile net income to net cash provided by operating activities:
Amortization and impairment of intangible assets	157,658	35,581	67,230
Depreciation and amortization of property and equipment	61,633	65,125	72,079
Amortization of debt discount and transaction costs	9,966	2,905	10,219
Amortization of deferred costs	76,640	57,539	44,829
Amortization of operating lease right-of-use assets	51,089	49,704	50,163
Stock-based compensation expense	346,751	307,710	278,892
Deferred income tax benefit	(160,849)	(3,974)	(244,933)
Effects of exchange rate changes on monetary assets and liabilities denominated in foreign currencies	11,709	(20,796)	2,631
Impairment and disposal of long-lived assets	36,861	9,106	2,832
Other non-cash items	(10,931)	17,209	7,798
Total adjustments to reconcile net income to net cash provided by operating activities	580,527	520,109	291,740
Changes in operating assets and liabilities, net of the effects of acquisitions:
Accounts receivable	(24,182)	(151,830)	(38,994)
Inventories	(4,028)	(4,220)	3,046
Prepaid expenses and other current assets	(42,932)	(44,447)	(7,129)
Other assets	(105,548)	(119,807)	(74,152)
Income taxes, net	(68,198)	(51,505)	(22,147)
Accounts payable	64,219	7,532	8,994
Accrued expenses and other current liabilities	(127,814)	161,454	(25,722)
Deferred revenues	101,773	106,785	(38,780)
Other liabilities	(9,665)	7,292	4,401
Total changes in operating assets and liabilities, net of the effects of acquisitions	(216,375)	(88,746)	(190,483)
Net cash provided by operating activities	671,651	935,809	783,070
Investing Activities
Purchases of available-for-sale investments	(23,719)	(513,608)	(20,003)
Proceeds from sales of available-for-sale investments	0	157,248	942,985
Proceeds from maturities of available-for-sale investments	134,273	277,056	178,070
Purchases of property and equipment	(83,432)	(41,438)	(63,454)
Cash paid for acquisitions, net of cash acquired	(2,022,304)	0	0
Cash paid for licensing agreements, patents and technology	(12,129)	(8,581)	(3,500)
Other	7,794	(8,982)	1,651
Net cash (used in) provided by investing activities	(1,999,517)	(138,305)	1,035,749
Financing Activities
Proceeds from issuance of common stock under stock-based compensation plans	283	0	0
Proceeds from term loan credit agreement, net of issuance costs	997,947	998,846	0
Repayment of term loan credit agreement	(150,000)	(750,000)	0
Proceeds from senior notes, net of issuance costs	741,393	738,107	0
Proceeds from credit facility	0	0	200,000
Repayment of credit facility	0	0	(200,000)
Repayment of acquired debt	(190,000)	0	0
Repayment on convertible notes	0	0	(1,164,497)
Stock repurchases, net	0	(1,288,483)	(453,853)
Cash paid for tax withholding on vested stock awards	(115,491)	(121,652)	(89,213)
Cash paid for dividends	(183,788)	(172,006)	(182,947)
Other	(5,438)	0	0
Net cash provided by (used in) financing activities	1,094,906	(595,188)	(1,890,510)
Effect of exchange rate changes on cash and cash equivalents	(5,942)	4,818	(1,314)
Change in cash and cash equivalents	(238,902)	207,134	(73,005)
Cash and cash equivalents at beginning of year	752,895	545,761	618,766
Cash and cash equivalents at end of year	513,993	752,895	545,761
Supplemental Cash Flow Information
Cash paid for income taxes	80,134	92,838	86,460
Cash paid for interest	84,802	52,638	37,667
Noncash financing activity:
Common stock issued for Employee Stock Purchase Plan	$ 50,222	$ 44,635	$ 39,469