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DEBT - Long-term debt (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021	Mar. 01, 2021
Debt Instrument [Line Items]
Total carrying amount of debt	$ 1,288,281	$ 1,037,646
Less: current portion of convertible notes	(89,654)	(86,052)
Debt, non-current	1,198,627	951,594
Convertible Notes | Notes due 2028
Debt Instrument [Line Items]
Long-term debt, gross	575,000	575,000
Less: unamortized debt discount	0	(143,636)
Less: unamortized debt issuance costs	(7,032)	(5,775)	$ (6,600)
Total carrying amount of debt	567,968	425,589
Convertible Notes | Notes due 2026
Debt Instrument [Line Items]
Long-term debt, gross	632,500	632,500
Less: unamortized debt discount	0	(104,755)
Less: unamortized debt issuance costs	(6,809)	(6,678)
Total carrying amount of debt	625,691	521,067
Convertible Notes | Notes due 2025
Debt Instrument [Line Items]
Long-term debt, gross	102,175	102,175
Less: unamortized debt discount	(11,344)	(14,584)
Less: unamortized debt issuance costs	(1,177)	(1,539)
Total carrying amount of debt	89,654	86,052
Less: current portion of convertible notes	(102,200)
Convertible Notes | Notes due 2023
Debt Instrument [Line Items]
Long-term debt, gross	5,000	5,000
Less: unamortized debt issuance costs	(32)	(62)
Total carrying amount of debt	$ 4,968	$ 4,938

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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