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CONVERTIBLE SENIOR NOTES AND CAPPED CALL - Carrying Amount of the Liability Component (Details) - Convertible Debt - Convertible Senior Notes - USD ($)	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021	Feb. 28, 2019
Debt Instrument [Line Items]
Principal	$ 500,000,000	$ 137,500,000	$ 362,500,000	$ 287,500,000
Unamortized debt discount	(48,657,000)		(53,323,000)
Unamortized issuance costs	(3,891,000)		(742,000)
Net carrying amount	$ 447,452,000		$ 308,435,000

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