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DEBT - Term Loan (Details) $ in Thousands	Sep. 16, 2020 USD ($)	Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020
Debt Instrument [Line Items]
Restricted cash		$ 35,315	$ 35,303
Term Loan | Alacer
Debt Instrument [Line Items]
Face amount	$ 245,000
Notional amount assumed equal to percentage of debt outstanding				37.00%
Restricted cash		$ 32,900	$ 32,900
Historic and forecast debt service cover ratio, minimum	1.20
Loan life cover ratio, minimum	1.30
Tail reserves as a percentage of total reserves, minimum	30.00%
Term Loan | Alacer | Interest Rate Swap
Debt Instrument [Line Items]
Derivative, fixed interest rate		2.86%
Term Loan | London Interbank Offered Rate (LIBOR) | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate	3.50%
Term Loan | London Interbank Offered Rate (LIBOR) | Maximum
Debt Instrument [Line Items]
Basis spread on variable rate	3.70%

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