SCHEDULE III - REAL ESTATE AND ACCUMULATED DEPRECIATION - Property Activity (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Investments in Real Estate
Balance, beginning of period	$ 637,205	$ 629,262
Additions:
Improvements	5,907	9,335
Property acquisitions	2,933	5,709
Deductions:
Assets held for sale	0	0
Asset sales	0	0
Impairment	0	0
Retirements	(3,343)	(7,101)
Balance, end of period	642,702	637,205
Accumulated Depreciation
Balance, beginning of period	(131,165)	(120,555)
Additions: depreciation	(16,896)	(17,711)
Assets held for sale	0	0
Asset sales	0	0
Retirements	3,343	7,101
Balance, end of period	$ (144,718)	$ (131,165)