DERIVATIVE INSTRUMENTS - Derivative Instruments on Statement of Operations (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Derivative [Line Items]
Unrealized gain (loss) from derivative instrument	$ (1,696)	$ (4,430)	$ (11,105)	$ (6,712)
Interest expense	6,940	7,590	13,851	15,486
Designated as Hedging Instrument | Interest Rate Contract
Derivative [Line Items]
Unrealized gain (loss) from derivative instrument	(1,696)	(4,430)	(11,105)	(6,712)
Accumulated Gain (Loss), Cash Flow Hedge, Including Noncontrolling Interest | Reclassification out of Accumulated Other Comprehensive Income | Interest Rate Contract
Derivative [Line Items]
Interest expense	$ 917	$ (29)	$ 573	$ (30)