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FAIR VALUE (Details) - USD ($)
$ in Thousands
Jun. 30, 2021
Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Notes receivable, fair value $ 4,200 $ 7,700
Long-term debt 330,000 382,040
Senior Notes | Senior Term Loan, Maturing January 3, 2023 | Credit and Guaranty Agreement    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Long-term debt fair value 294,800 278,000
Long-term debt 0 279,417
Secured Debt | Credit Agreement    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Long-term debt $ 300,000 $ 0