DEBT - Schedule of Debt (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021	Dec. 30, 2021	Jul. 31, 2020	Mar. 31, 2017
Convertible Senior Notes Due 2025
Debt Instrument [Line Items]
Stated interest rate (as a percent)	0.75%
Convertible Senior Notes Due 2022
Debt Instrument [Line Items]
Stated interest rate (as a percent)	2.375%
Unsecured Debt
Debt Instrument [Line Items]
Total debt, net of debt discount and deferred financing costs	$ 923,423	$ 1,049,230
Unsecured Debt | Convertible Senior Notes Due 2025
Debt Instrument [Line Items]
Stated interest rate (as a percent)	0.75%			0.75%
Convertible senior notes	$ 402,500	402,500
Deferred financing costs	(8,225)	(7,155)
Discount on debt	0	(64,718)
Total debt, net of debt discount and deferred financing costs	$ 394,275	330,627
Unsecured Debt | Convertible Senior Notes Due 2022
Debt Instrument [Line Items]
Stated interest rate (as a percent)	2.375%			2.375%	2.375%
Convertible senior notes	$ 160,000	160,000
Deferred financing costs	0	(223)
Discount on debt	0	(1,920)
Total debt, net of debt discount and deferred financing costs	160,000	157,857
Secured Debt | Term Loan B Facility Due 2026
Debt Instrument [Line Items]
Convertible senior notes	375,000	375,000
Deferred financing costs	(4,138)	(4,443)
Discount on debt	(10,354)	(11,060)	$ (11,200)
Total debt, net of debt discount and deferred financing costs	$ 360,508	$ 359,497