Condensed Consolidated Statements Of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Operating Activities
Net income	$ 204,601	$ 392,355
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and other	247,489	159,283
Stock-based compensation expense	249,601	228,854
Deferred income tax benefit	(5,847)	(34,372)
Effects of exchange rate changes on monetary assets and liabilities denominated in foreign currencies	13,878	(9,225)
Other non-cash items	(17,485)	16,196
Total adjustments to reconcile net income to net cash provided by operating activities	487,636	360,736
Changes in operating assets and liabilities, net of the effects of acquisitions:
Accounts receivable	339,969	150,347
Inventories	(5,098)	(592)
Prepaid expenses and other current assets	(54,686)	(39,049)
Other assets	(79,733)	(67,139)
Income taxes, net	(63,915)	16,640
Accounts payable	32,912	17,973
Accrued expenses and other current liabilities	(191,484)	73,737
Deferred revenues	(157,372)	(103,487)
Other liabilities	(45)	14,252
Total changes in operating assets and liabilities, net of the effects of acquisitions	(179,452)	62,682
Net cash provided by operating activities	512,785	815,773
Investing Activities
Purchases of available-for-sale investments	(19,827)	(476,432)
Proceeds from maturities of available-for-sale investments	122,900	166,077
Purchases of property and equipment	(63,590)	(30,783)
Cash paid for acquisitions, net of cash acquired	(2,022,304)	0
Cash paid for licensing agreements, patents and technology	(8,656)	(5,581)
Other	7,050	923
Net cash used in investing activities	(1,984,427)	(345,796)
Financing Activities
Proceeds from issuance of common stock under stock-based compensation plan	233	0
Proceeds from term loan credit agreement, net of issuance costs	997,947	998,846
Repayment of term loan credit agreement	(150,000)	(750,000)
Proceeds from senior notes, net of issuance costs	741,393	738,107
Repayment of acquired debt	(190,000)	0
Stock repurchases, net	0	(1,199,903)
Cash paid for tax withholding on vested stock awards	(105,143)	(104,848)
Cash paid for dividends	(137,590)	(129,108)
Other	(5,438)	0
Net cash provided by (used in) financing activities	1,151,402	(446,906)
Effect of exchange rate changes on cash and cash equivalents	(4,086)	(8)
Change in cash and cash equivalents	(324,326)	23,063
Cash and cash equivalents at beginning of period	752,895	545,761
Cash and cash equivalents at end of period	$ 428,569	$ 568,824