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Significant Accounting Policies (Details) - USD ($)
shares in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Dec. 31, 2017
Significant Accounting Policies [Line Items]          
Ownership percentage 8.20%   8.20%    
Investment in unconsolidated entity         $ 0
Impairment of unconsolidated entities $ 0 $ 0 $ 0 $ 0  
Undiscounted future minimum rentals due under non-cancelable leases         $ 175,400,000
Ashford Inc.          
Significant Accounting Policies [Line Items]          
Investment owned (in shares) 195   195   195
Ownership percentage 9.20%   9.20%   9.30%
Investment in unconsolidated entity $ 12,628,000   $ 12,628,000   $ 18,124,000
Minimum | Restricted Cash          
Significant Accounting Policies [Line Items]          
Replacement reserve escrow as percentage of property revenue     4.00%    
Maximum | Restricted Cash          
Significant Accounting Policies [Line Items]          
Replacement reserve escrow as percentage of property revenue     5.00%