INCOME TAXES - Differences Between Income Tax Provision (Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
U.S. federal income tax provision (benefit) at statutory rate	$ (40,314)	$ 18,485	$ (61,805)
Foreign income and losses taxed at different rates	9,035	5,000	8,608
State income taxes, net of federal benefits, and state tax credits	4,133	4,897	6,487
Change in valuation allowances	64,328	(50,695)	(4,474)
Effect of income tax rate changes on deferred items	443	815	618
Adjustments related to uncertain tax positions	(13,062)	2,588	(15,518)
Non-deductible stock-based compensation expense	2,191	2,727	3,803
Tax (windfalls)/shortfalls on stock-based compensation awards	2,741	(1,762)	3,876
Federal research and development credits, net of adjustments	(812)	(396)	6,043
Forgiveness of intercompany liabilities	1,468	(62)	(2,863)
Tax attribute expiration	5,519	0	19,962
Goodwill impairment	7,213	0	23,202
Observable price change on an other equity investment	0	(17,955)	0
Non-deductible or non-taxable items	(473)	4,035	4,557
Provision (benefit) for income taxes	$ 42,410	$ (32,323)	$ (7,504)