LONG-TERM DEBT - Components of Convertible Debt Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Debt Instrument [Line Items]
Amortization of debt discount and issuance costs	$ 8,397	$ 2,040
Total interest expense	18,605	9,396
Convertible debt
Debt Instrument [Line Items]
Coupon interest	1,568	1,164
Amortization of debt discount and issuance costs	627	766
Total interest expense	$ 2,195	$ 1,930
Effective interest rate	9.75%	9.12%