Schedule III-Real Estate and Accumulated Depreciation Real Estate - Accumulated Depreciation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]
Beginning Balance	$ 161,063	$ 122,008	$ 83,056
Reclassification of intangibles to accumulated amortization			1,316
Additions	42,532	41,332	40,726
Dispositions	(29,657)	(2,277)	(3,090)
Ending Balance	173,938	161,063	122,008
Commercial Real Estate
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]
Beginning Balance	159,138	118,630	78,376
Reclassification of intangibles to accumulated amortization			1,316
Additions	42,246	40,508	39,398
Dispositions	(28,277)	0	(460)
Ending Balance	173,107	159,138	118,630
Residential Real Estate
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]
Beginning Balance	1,925	3,378	4,680
Reclassification of intangibles to accumulated amortization			0
Additions	286	824	1,328
Dispositions	(1,380)	(2,277)	(2,630)
Ending Balance	$ 831	$ 1,925	$ 3,378