DEBT - Carrying Value of Debt (Details) - USD ($) $ in Thousands	Jan. 07, 2022	Dec. 31, 2021	Dec. 31, 2020	Jul. 10, 2020	Mar. 13, 2017
0.750% Convertible Senior Notes Due 2025
Debt Instrument [Line Items]
Stated interest rate (as a percent)		0.75%
3.375% Convertible Senior Notes Due 2024
Debt Instrument [Line Items]
Stated interest rate (as a percent)		3.375%
2.375% Convertible Senior Notes Due 2022
Debt Instrument [Line Items]
Stated interest rate (as a percent)		2.375%
Term Loan | 7.000% Term Loan B Facility Maturing 2026
Debt Instrument [Line Items]
Long-term debt outstanding		$ 359,497	$ 0
Unsecured Debt
Debt Instrument [Line Items]
Long-term debt outstanding		1,049,230	462,678
Unsecured Debt | 0.750% Convertible Senior Notes Due 2025
Debt Instrument [Line Items]
Long-term debt outstanding		$ 330,627	313,030
Stated interest rate (as a percent)		0.75%		0.75%
Unsecured Debt | 3.375% Convertible Senior Notes Due 2024
Debt Instrument [Line Items]
Long-term debt outstanding		$ 201,249	0
Unsecured Debt | 3.375% Convertible Senior Notes Due 2024 | Subsequent Event
Debt Instrument [Line Items]
Long-term debt outstanding	$ 8,600
Unsecured Debt | 2.375% Convertible Senior Notes Due 2022
Debt Instrument [Line Items]
Long-term debt outstanding		$ 157,857	$ 149,648
Stated interest rate (as a percent)		2.375%		2.375%	2.375%