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, 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 exercise of stock options and vesting of restricted and deferred stock units, net of shares withheld for employee taxes (in shares)			1,376,712
Issuance of common stock upon the exercise of stock options and vesting of restricted and deferred stock units, net of shares withheld for employee taxes	(72,770)		$ 14	(72,784)
Issuance of common stock under employee stock purchase plan (in shares)			335,644
Issuance of common stock under employee stock purchase plan	29,308		$ 3	29,305
Stock-based compensation	183,041			183,041
Repurchases of common stock (in shares)			(4,347,856)
Repurchases of common stock	(430,269)						(430,269)
Net income	394,910							394,910
Foreign currency translation adjustments	(86,321)					(86,321)
Change in unrealized gain (loss) on available-for-sale investments, net of tax	(31,246)					(31,246)
Ending balance (in shares) at Sep. 30, 2022			157,876,611
Ending balance at Sep. 30, 2022	4,281,240		$ 1,622	3,104,970		(186,672)	(430,269)	1,791,589
Beginning balance (in shares) at Jun. 30, 2022			159,469,828
Beginning balance at Jun. 30, 2022	4,312,994		$ 1,620	3,054,200		(143,079)	(267,642)	1,667,895
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon the exercise of stock options and vesting of restricted and deferred stock units, net of shares withheld for employee taxes (in shares)			195,331
Issuance of common stock upon the exercise of stock options and vesting of restricted and deferred stock units, net of shares withheld for employee taxes	(8,242)		$ 2	(8,244)
Stock-based compensation	59,014			59,014
Repurchases of common stock (in shares)			(1,788,548)
Repurchases of common stock	(162,627)						(162,627)
Net income	123,694							123,694
Foreign currency translation adjustments	(39,079)					(39,079)
Change in unrealized gain (loss) on available-for-sale investments, net of tax	(4,514)					(4,514)
Ending balance (in shares) at Sep. 30, 2022			157,876,611
Ending balance at Sep. 30, 2022	$ 4,281,240		$ 1,622	3,104,970		(186,672)	(430,269)	1,791,589
Beginning balance (in shares) at Dec. 31, 2022	156,494,816		156,494,816
Beginning balance at Dec. 31, 2022	$ 4,360,187		$ 1,565	2,578,603		(140,332)	0	1,920,351
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon the exercise of stock options and vesting of restricted and deferred stock units, net of shares withheld for employee taxes (in shares)			1,367,793
Issuance of common stock upon the exercise of stock options and vesting of restricted and deferred stock units, net of shares withheld for employee taxes	(52,702)		$ 14	(52,716)
Issuance of common stock under employee stock purchase plan (in shares)			399,395
Issuance of common stock under employee stock purchase plan	31,269		$ 4	31,265
Stock-based compensation	288,490			288,490
Issuance of warrants related to convertible senior notes	90,195			90,195
Purchase of note hedge related to convertible senior notes, net of deferred taxes of $57,628	(178,927)			(178,927)
Repurchases of common stock (in shares)			(7,306,155)
Repurchases of common stock	(603,632)						(603,632)
Net income	386,464							386,464
Foreign currency translation adjustments	(9,604)					(9,604)
Change in unrealized gain (loss) on available-for-sale investments, net of tax	$ 12,464					12,464
Ending balance (in shares) at Sep. 30, 2023	150,955,849		150,955,849
Ending balance at Sep. 30, 2023	$ 4,324,204		$ 1,583	2,756,910		(137,472)	(603,632)	2,306,815
Beginning balance (in shares) at Jun. 30, 2023			151,790,861
Beginning balance at Jun. 30, 2023	4,289,167		$ 1,580	2,751,681		(119,964)	(490,403)	2,146,273
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon the exercise of stock options and vesting of restricted and deferred stock units, net of shares withheld for employee taxes (in shares)			279,776
Issuance of common stock upon the exercise of stock options and vesting of restricted and deferred stock units, net of shares withheld for employee taxes	(11,460)		$ 3	(11,463)
Stock-based compensation	105,424			105,424
Issuance of warrants related to convertible senior notes	90,195			90,195
Purchase of note hedge related to convertible senior notes, net of deferred taxes of $57,628	(178,927)			(178,927)
Repurchases of common stock (in shares)			(1,114,788)
Repurchases of common stock	(113,229)						(113,229)
Net income	160,542							160,542
Foreign currency translation adjustments	(20,250)					(20,250)
Change in unrealized gain (loss) on available-for-sale investments, net of tax	$ 2,742					2,742
Ending balance (in shares) at Sep. 30, 2023	150,955,849		150,955,849
Ending balance at Sep. 30, 2023	$ 4,324,204		$ 1,583	$ 2,756,910		$ (137,472)	$ (603,632)	$ 2,306,815