RISK MANAGEMENT AND USE OF FINANCIAL INSTRUMENTS (Narrative) (Details) - USD ($) $ in Thousands	1 Months Ended		3 Months Ended		6 Months Ended		12 Months Ended
	May 31, 2020	Mar. 31, 2020	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2020	Dec. 31, 2019
Reclassification to earnings as interest expense			$ (188)	$ 4	$ (239)	$ 4
Scenario, Forecast [Member]
Reclassification to earnings as interest expense							$ 1,000
Interest Rate Cap [Member]
Interest rate Swap/Cap, notional amount	$ 100,000	$ 20,000		$ 100,000		$ 100,000
Interest rate swap, maturity date	Mar. 24, 2023	Dec. 28, 2021		Dec. 28, 2021
Interest Rate Cap [Member] | Nondesignated [Member]
Net carrying amount of interest rate swap			$ 200		$ 200			$ 10
London Interbank Offered Rate (LIBOR) [Member] | Interest Rate Cap [Member]
Interest rate cap	0.50%	1.50%		2.50%		2.50%