CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss), Net	Retained Earnings
Beginning Balance (in shares) at Dec. 31, 2020		78,860
Beginning Balance at Dec. 31, 2020	$ 3,233,865	$ 8	$ 974,556	$ 43,501	$ 2,215,800
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	200,376				200,376
Change in unrealized gains (losses) on investments, net of tax	(20)			(20)
Change in foreign currency translation adjustment, net of tax	(14,451)			(14,451)
Issuance of common stock relating to employee equity compensation plans (in shares)		276
Issuance of common stock relating to employee equity compensation plans	13,133		13,133
Tax withholdings related to net share settlements of equity awards	(66,568)		(66,568)
Stock-based compensation	27,241		27,241
Ending Balance at Mar. 31, 2021	3,393,576	$ 8	948,362	29,030	2,416,176
Ending Balance (in shares) at Mar. 31, 2021		79,136
Beginning Balance (in shares) at Dec. 31, 2021		78,710
Beginning Balance at Dec. 31, 2021	3,622,714	$ 8	999,006	4,326	2,619,374
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	134,298				134,298
Change in unrealized gains (losses) on investments, net of tax	(2,728)			(2,728)
Change in foreign currency translation adjustment, net of tax	(7,311)			(7,311)
Issuance of common stock relating to employee equity compensation plans (in shares)		239
Issuance of common stock relating to employee equity compensation plans	14,827		14,827
Tax withholdings related to net share settlements of equity awards	(51,533)		(51,533)
Common stock repurchased and retired	(75,036)		(1,634)		(73,402)
Common stock repurchased and retired (in shares)		(144)
Stock-based compensation	31,621		31,621
Ending Balance at Mar. 31, 2022	$ 3,666,852	$ 8	$ 992,287	$ (5,713)	$ 2,680,270
Ending Balance (in shares) at Mar. 31, 2022		78,805