Schedule III - Real Estate and Accumulated Depreciation Schedule III - Reconciliation of Accumulated Depreciation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Balance at the beginning of the period	$ 83,056	$ 50,605	$ 25,601
Reclassification of intangibles to accumulated amortization	1,316
Additions	40,726	40,490	28,916
Dispositions	(3,090)	(8,039)	(3,912)
Balance at the end of the period	122,008	83,056	50,605
Commercial Real Estate
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Balance at the beginning of the period	78,376	45,856	23,061
Reclassification of intangibles to accumulated amortization	1,316
Additions	39,398	38,213	25,212
Dispositions	(460)	(5,693)	(2,417)
Balance at the end of the period	118,630	78,376	45,856
Residential Real Estate
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Balance at the beginning of the period	4,680	4,749	2,540
Reclassification of intangibles to accumulated amortization
Additions	1,328	2,277	3,704
Dispositions	(2,630)	(2,346)	(1,495)
Balance at the end of the period	$ 3,378	$ 4,680	$ 4,749