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Real Estate Properties - Dispositions (Details)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 22, 2017
USD ($)
room
Aug. 31, 2017
USD ($)
room
Aug. 01, 2017
USD ($)
room
Sep. 30, 2017
USD ($)
hotel
Sep. 30, 2016
USD ($)
Sep. 30, 2017
USD ($)
Sep. 30, 2016
USD ($)
Real Estate [Line Items]              
Gain on sale of real estate       $ 9,348 $ 0 $ 9,348 $ 0
Chandler, AZ | Hotel              
Real Estate [Line Items]              
Number of rooms sold | room     159        
Proceeds from sale of property held-for-sale     $ 9,085        
Gain on sale of real estate       4,336      
Naperville, IL | Hotel              
Real Estate [Line Items]              
Number of rooms sold | room   143          
Proceeds from sale of property held-for-sale   $ 6,313          
Gain on sale of real estate       $ 2,303      
Carlson | Chandler, AZ, Bloomington, MN, and Naperville, IL | Hotel              
Real Estate [Line Items]              
Number of properties sold | hotel       3      
Carlson | Bloomington, MN | Hotel              
Real Estate [Line Items]              
Number of rooms sold | room 209            
Proceeds from sale of property held-for-sale $ 8,030            
Gain on sale of real estate       $ 2,709