DERIVATIVE INSTRUMENTS - Derivative Instruments on Statement of Operations (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Derivative [Line Items]
Unrealized gain (loss) from derivative instrument	$ (210)	$ (2,251)	$ (11,314)	$ (8,963)
Interest expense	6,771	7,694	20,622	23,180
Interest Rate Contract | Accumulated Gain (Loss), Cash Flow Hedge, Including Noncontrolling Interest | Reclassification out of Accumulated Other Comprehensive Income
Derivative [Line Items]
Interest expense	(1,093)	(56)	(1,665)	(26)
Designated as Hedging Instrument | Interest Rate Contract
Derivative [Line Items]
Unrealized gain (loss) from derivative instrument	$ (210)	$ (2,251)	$ (11,314)	$ (9,819)