INCOME TAXES - Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Income tax provision at the federal statutory rate of 21%		$ 53,791	$ 132,500	$ 111,808
State income taxes, net of effect of federal tax benefit		4,530	8,803	10,274
Stock-based compensation		(63,751)	(112,203)	(90,374)
Research credits		(25,830)	(21,306)	(27,248)
Change in valuation allowance		8,523	29,787	0
Foreign income taxed at a different statutory rate		5,808	4,884	3,526
Withholding taxes		1,057	2,933	5,023
Change in uncertain tax positions		(948)	(5,770)	(637)
Other, net		(3,077)	3,645	2,708
Income tax (benefit) provision	$ 28,497	$ (19,897)	$ 43,273	$ 15,080