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DEBT - Net Carrying Amount (Details) - Convertible debt - USD ($)
$ in Thousands
Mar. 31, 2022
Dec. 31, 2021
Debt Instrument [Line Items]    
Principal $ 600,000 $ 600,000
Unamortized issuance costs (8,560) (9,278)
Convertible senior notes, net $ 591,440 $ 590,722