INCOME TAXES - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Operating Loss Carryforwards [Line Items]
Increase in valuation allowance	$ 649,100	$ 378,400
Unrecognized tax benefits	448,392	295,182	$ 217,574	$ 198,540
Unrecognized tax benefit that would impact annual effective tax rate	35,400
Total accrued interest and penalties related to uncertain tax positions	7,800	$ 1,400	$ 500
Undistributed earnings of non-U.S. subsidiaries	100
Federal
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	4,487,100
Federal | Research Tax Credit Carryforward
Operating Loss Carryforwards [Line Items]
Tax credit carryforward	299,000
State
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	5,105,200
State | Research Tax Credit Carryforward
Operating Loss Carryforwards [Line Items]
Tax credit carryforward	182,400
Foreign
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	976,900
Maximum | Tax examinations or lapse of applicable statute of limitations
Operating Loss Carryforwards [Line Items]
Reasonably possible decrease in unrecognized tax benefits	$ 10,800