BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - Revenues (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Fixed lease income - operating leases	$ 189,452	$ 168,119	$ 176,706
Variable lease income - operating leases	8,565	7,068	5,586
Revenues, Total	201,705	177,994	185,755
Other Property Revenue
Disaggregation of Revenue [Line Items]
Other property revenue	$ 3,688	$ 2,807	$ 3,463