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Commitments and Contingencies - Additional Information (Details)
 1 Months Ended 3 Months Ended 12 Months Ended
Sep. 30, 2015
Term
Mar. 31, 2018
USD ($)
Term
ParkingSpace
renewal_period
Mar. 31, 2017
USD ($)
Dec. 31, 2017
agreement
Capital Leased Assets [Line Items]        
Maximum additional terms up to which ground lease can be extended (up to) | Term   12    
Periods in each additional renewal term   5 years    
Approximate rent when monthly occupancy is less than 85%   $ 8,000    
Percentage of occupancy under condition one (less than)   85.00%    
Approximate rent when monthly occupancy is 100%   $ 20,000    
Percentage of occupancy under condition two   100.00%    
Minimum percentage of annual rent increase   2.50%    
Number of management agreements | agreement       6
Management fees recorded within hotel other operating expenses   $ 2,400,000 $ 2,200,000  
Franchise fees recorded within hotel other operating expenses   $ 5,500,000 $ 5,300,000  
Hotel Management Agreement | Island Hospitality Management Inc.        
Capital Leased Assets [Line Items]        
Initial terms of management agreements   5 years    
Number of renewal periods (in renewal periods) | renewal_period   2    
Renewal periods of management agreements   5 years    
Notice period for successive renewal of agreement (no later than)   90 days    
Minimum notice period for termination of management agreement   6 months    
Management fee   10.00%    
Incentive management fee   1.00%    
Ground Leases | Hilton Garden Inn Portsmouth        
Capital Leased Assets [Line Items]        
Maximum additional terms up to which ground lease can be extended (up to) | Term   3    
Periods in each additional renewal term   10 years    
Operating leases, monthly payment   $ 40,000    
Operating lease, periodic increase, percentage   10.00%    
Operating lease, periodic increase, term   5 years    
Operating lease, annual supplemental rent, percentage of gross revenues (equal to)   5.00%    
Operating lease, annual supplemental rent subtraction, base rent multiplier   12    
Ground Leases | Hilton Garden Inn Marina del Rey, CA        
Capital Leased Assets [Line Items]        
Operating leases, monthly payment   $ 47,500    
Ground Leases | Hilton Garden Inn Marina del Rey, CA | Minimum        
Capital Leased Assets [Line Items]        
Operating lease, annual supplemental rent, percentage of gross revenues (equal to)   5.00%    
Ground Leases | Hilton Garden Inn Marina del Rey, CA | Maximum        
Capital Leased Assets [Line Items]        
Operating lease, annual supplemental rent, percentage of gross revenues (equal to)   25.00%    
Air Rights Lease And Garage Lease        
Capital Leased Assets [Line Items]        
Number of parking spaces occupied by hotel (in parking spaces) | ParkingSpace   128    
Quarterly rent   $ 26,000    
Office Leases        
Capital Leased Assets [Line Items]        
Maximum additional terms up to which ground lease can be extended (up to) | Term 2      
Periods in each additional renewal term 5 years      
Operating leases, term of contract 11 years      
Operating leases, abatement term of contract 12 months      
Accounts Payable and Accrued Liabilities        
Capital Leased Assets [Line Items]        
Amount of exposure to litigation   $ 200,000