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DEBT - Long-term Debt (Details) - USD ($)
$ in Thousands
Mar. 31, 2022
Dec. 31, 2021
Debt Instrument [Line Items]    
Long-term debt, gross $ 489,001 $ 433,035
Less: unamortized discount and fees (4,647) (4,720)
Less: current portion 0 0
Long-term debt 484,354 428,315
Senior Notes due 2028    
Debt Instrument [Line Items]    
Long-term debt, gross 400,000 400,000
Revolving Credit Agreement    
Debt Instrument [Line Items]    
Long-term debt, gross $ 89,001 $ 33,035