INCOME TAXES - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2016
Income Tax Contingency [Line Items]
Valuation allowance	$ 2,137,851	$ 1,374,265
Increase valuation allowance for deferred tax assets	763,600	701,400
Unrecognized tax benefits	140,767	105,234	$ 72,330	$ 42,894
Unrecognized tax benefits that would impact effective tax rate	1,100	$ 600	$ 500
Federal
Income Tax Contingency [Line Items]
Operating loss carryforwards	4,471,100
Operating loss carryforwards, amount nullified by ownership change					$ 12,000
Research and development tax credit carryforward nullified by ownership change					$ 3,000
Federal | Research Tax Credit Carryforward
Income Tax Contingency [Line Items]
Tax credit carryforward, amount	158,200
State
Income Tax Contingency [Line Items]
Operating loss carryforwards	3,980,400
State | Research Tax Credit Carryforward
Income Tax Contingency [Line Items]
Tax credit carryforward, amount	121,200
Foreign
Income Tax Contingency [Line Items]
Operating loss carryforwards	$ 1,700