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Favorable Lease Assets - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Dec. 31, 2015
Business Acquisition [Line Items]          
Finite-lived intangible assets, amortization expense $ 0.1 $ 0.1 $ 0.2 $ 0.4  
Off-Market Favorable Lease          
Business Acquisition [Line Items]          
Accumulated amortization $ 2.3   $ 2.3   $ 2.6