INCOME TAXES - Additional Tax Disclosures (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Taxes
Income tax expense recognized	$ 76,400
Accrued interest and penalties	0	$ 0
Uncertain Tax Positions
Unrecognized tax benefits	14,872	15,185	$ 15,342	$ 15,413
Gross decrease in tax portions from prior years			$ (71)
Net decrease in tax portions for 2020		$ (157)
Net decrease in tax portions for 2021	(313)
Unrecognized tax benefits would affect the effective income tax rate if recognized	8,400
Federal
Income Taxes
Net operating loss carryforwards	92,900,000
Tax credit carryforward amount	42,100
State
Income Taxes
Net operating loss carryforwards	648,600
State | Research and development
Income Taxes
Tax credit carryforward amount	$ 31,600