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Favorable Lease Assets - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Dec. 31, 2016
Business Acquisition [Line Items]          
Finite-lived intangible assets, amortization expense $ 0.1 $ 0.1 $ 0.3 $ 0.2  
Off-Market Favorable Lease          
Business Acquisition [Line Items]          
Accumulated amortization 2.6   2.6   $ 2.3
Orchards Inn | Off-Market Favorable Lease          
Business Acquisition [Line Items]          
Carrying amount of the lease right $ 9.1   $ 9.1