Summary of Significant Accounting Policies Summary of Significant Accounting Policies - Real Estate (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Period for change in initial valuation from acquisition	12 days
Total real estate	$ 163,750	$ 175,069
Net	899	352
Lease Intangibles
Property, Plant and Equipment [Line Items]
Cost	2,288	1,599
Less: accumulated depreciation and amortization	(1,389)	(1,247)
Net	899	352
Acquired Below-Market Leases
Property, Plant and Equipment [Line Items]
Cost	(207)	(137)
Less: accumulated depreciation and amortization	155	72
Net	$ (52)	(65)
Hotels
Property, Plant and Equipment [Line Items]
Estimated useful life	39 years
Buildings and Improvements
Property, Plant and Equipment [Line Items]
Estimated useful life	25 years
Cost	$ 157,074	164,087
Less: accumulated depreciation and amortization	(30,421)	(31,728)
Total real estate	126,653	132,359
Land and Improvements
Property, Plant and Equipment [Line Items]
Cost	40,354	45,885
Less: accumulated depreciation and amortization	(3,257)	(3,175)
Total real estate	$ 37,097	$ 42,710