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DERIVATIVE INSTRUMENTS - Derivative Instruments on Statement of Operations (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Derivative [Line Items]    
Unrealized gain (loss) from derivative instrument $ 2,011 $ (9,408)
Interest expense 7,231 6,911
Interest Rate Contract | Accumulated Gain (Loss), Cash Flow Hedge, Including Noncontrolling Interest | Reclassification out of Accumulated Other Comprehensive Income    
Derivative [Line Items]    
Interest expense (1,095) (345)
Designated as Hedging Instrument | Interest Rate Contract    
Derivative [Line Items]    
Unrealized gain (loss) from derivative instrument $ 2,011 $ (9,408)