LEASES (Lease Costs) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Lessee, Lease, Description
Operating lease costs	$ 1,171	$ 1,171	$ 2,368	$ 2,342
Variable lease costs	97	95	205	175
Total lease costs	1,268	1,266	2,573	2,517
Ground Lease
Lessee, Lease, Description
Operating lease costs	1,050	1,050	2,126	2,100
Variable lease costs	14	8	38	21
Total lease costs	1,064	1,058	2,164	2,121
Office Lease
Lessee, Lease, Description
Operating lease costs	121	121	242	242
Variable lease costs	83	87	167	154
Total lease costs	$ 204	$ 208	$ 409	$ 396