CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Cumulative-effect adjustment from adoption of new accounting pronouncement	Common Stock	Additional Paid-in Capital	Additional Paid-in Capital Cumulative-effect adjustment from adoption of new accounting pronouncement	Accumulated Other Comprehensive Loss	Treasury Stock	Retained Earnings	Retained Earnings Cumulative-effect adjustment from adoption of new accounting pronouncement
Beginning balance (in shares) at Dec. 31, 2020			162,709,720
Beginning balance at Dec. 31, 2020	$ 4,251,296		$ 1,627	$ 3,664,820		$ (20,201)	$ 0	$ 605,050
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon the vesting of restricted and deferred stock units, net of shares withheld for employee taxes (in shares)			1,128,184
Issuance of common stock upon the vesting of restricted and deferred stock units, net of shares withheld for employee taxes	(64,006)		$ 11	(64,017)
Stock-based compensation	63,765			63,765
Repurchases of common stock (in shares)			(591,963)
Repurchases of common stock	(58,241)						(58,241)
Net income	155,695							155,695
Foreign currency translation adjustments	(24,265)					(24,265)
Change in unrealized loss on investments, net of tax	(2,881)					(2,881)
Ending balance (in shares) at Mar. 31, 2021			163,245,941
Ending balance at Mar. 31, 2021	4,321,363		$ 1,638	3,664,568		(47,347)	(58,241)	760,745
Beginning balance (in shares) at Dec. 31, 2021			160,512,111
Beginning balance at Dec. 31, 2021	4,530,014	$ (235,427)	$ 1,605	3,340,822	$ (375,414)	(69,105)	0	1,256,692	$ 139,987
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon the vesting of restricted and deferred stock units, net of shares withheld for employee taxes (in shares)			948,150
Issuance of common stock upon the vesting of restricted and deferred stock units, net of shares withheld for employee taxes	(54,639)		$ 10	(54,649)
Stock-based compensation	63,770			63,770
Repurchases of common stock (in shares)			(924,492)
Repurchases of common stock	(102,853)						(102,853)
Net income	119,163							119,163
Foreign currency translation adjustments	2,036					2,036
Change in unrealized loss on investments, net of tax	(21,542)					(21,542)
Ending balance (in shares) at Mar. 31, 2022			160,535,769
Ending balance at Mar. 31, 2022	$ 4,300,522		$ 1,615	$ 2,974,529		$ (88,611)	$ (102,853)	$ 1,515,842