LEASES (Lease Costs) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Lessee, Lease, Description
Operating lease costs	$ 1,171	$ 1,173	$ 3,539	$ 3,515
Variable lease costs	138	63	344	239
Total lease costs	1,309	1,236	3,883	3,754
Ground Lease
Lessee, Lease, Description
Operating lease costs	1,050	1,052	3,176	3,152
Variable lease costs	79	10	117	31
Total lease costs	1,129	1,062	3,293	3,183
Office Lease
Lessee, Lease, Description
Operating lease costs	121	121	363	363
Variable lease costs	59	53	227	208
Total lease costs	$ 180	$ 174	$ 590	$ 571