SCHEDULE III REAL ESTATE ASSETS AND ACCUMULATED DEPRECIATION AND AMORTIZATION (Reconciliation) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Real Estate:
Balance at the beginning of the year	$ 547,310	$ 549,086	$ 324,176
Acquisitions	0	0	203,869
Improvements	13,744	9,577	10,075
Construction in progress	317	5,940	13,280
Write-off of fully depreciated and fully amortized assets	(1,343)	(2,548)	(2,314)
Disposition	(14,622)	0	0
Impairments	0	(14,745)	0
Balance at the end of the year	545,406	547,310	549,086
Accumulated depreciation and amortization:
Balance at the beginning of the year	35,704	18,646	6,853
Depreciation and amortization expense	19,326	19,606	14,107
Write-off of fully depreciated and fully amortized assets	(1,343)	(2,548)	(2,314)
Disposition	(1,964)	0	0
Balance at the end of the year	$ 51,723	$ 35,704	$ 18,646