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Acquisition of Hotel Properties - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 20, 2017
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Business Acquisition [Line Items]          
Acquisition related costs   $ 0.4 $ 0.6 $ 0.4 $ 1.4
Hilton Garden Inn Portsmouth          
Business Acquisition [Line Items]          
Consideration transferred in acquisition $ 43.4