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FAIR VALUE OF FINANCIAL INSTRUMENTS - RECURRING (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Fair value of financial instruments    
Principal amount of floating rate debt $ 246,000 $ 449,228
Carrying Value    
Fair value of financial instruments    
Cash and cash equivalents 114,573 143,872
Restricted cash 5,958 35,807
Principal amount of floating rate debt 246,000 449,228
Fair value    
Fair value of financial instruments    
Cash and cash equivalents 114,573 143,872
Restricted cash 5,958 35,807
Principal amount of floating rate debt $ 246,000 $ 449,228