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Organization (Details)
 1 Months Ended 3 Months Ended
Jan. 31, 2014
USD ($)
Mar. 31, 2019
USD ($)
Hotel
Room
state
$ / shares
shares
Mar. 31, 2018
USD ($)
Nov. 17, 2014
Subsidiary, Sale of Stock [Line Items]        
Proceeds from issuance of common shares   $ 119,000 $ 10,537,000  
Percentage of common units of limited partnership owned   100.00%    
Aggregate number of rooms in hotels (in rooms) | Room   6,283    
Number of states in which hotels are owned (in states) | state   15    
Initial term of each TRS lease   5 years    
Island Hospitality Management Inc.        
Subsidiary, Sale of Stock [Line Items]        
Number of hotels managed by related party (in hotels) | Hotel   34    
Island Hospitality Management Inc.        
Subsidiary, Sale of Stock [Line Items]        
Number of hotels managed by related party (in hotels) | Hotel   42    
Ownership percentage in related party owned by the company's chairman   51.00%    
NewINK Joint Venture        
Subsidiary, Sale of Stock [Line Items]        
Indirect ownership in the leased hotels   10.30%    
Inland Joint Venture        
Subsidiary, Sale of Stock [Line Items]        
Aggregate number of rooms in hotels (in rooms) | Room   6,402    
Indirect ownership in the leased hotels       10.00%
Number of hotels acquired (in hotels) | Hotel   48    
Inland Joint Venture | Island Hospitality Management Inc.        
Subsidiary, Sale of Stock [Line Items]        
Number of hotels managed by related party (in hotels) | Hotel   34    
Inland Joint Venture | Marriott International, Inc.        
Subsidiary, Sale of Stock [Line Items]        
Number of hotels managed by related party (in hotels) | Hotel   14    
Minority Interest In Joint Venture Rooms | Cerberus Capital Management        
Subsidiary, Sale of Stock [Line Items]        
Aggregate number of rooms in hotels (in rooms) | Room   6,098    
Number of hotels managed by related party (in hotels) | Hotel   47    
ATM Plan        
Subsidiary, Sale of Stock [Line Items]        
Stock purchase plan, authorized amount $ 50,000,000      
Registration statement filed, amount 100,000,000      
Total number of shares issued (in shares) | shares   2,498,670    
Stock purchase plan, average price per share (in dollars per share) | $ / shares   $ 21.83    
Stock purchase plan, remaining authorized repurchase amount   $ 92,400,000    
DRSP Plan        
Subsidiary, Sale of Stock [Line Items]        
Stock purchase plan, authorized amount 25,000,000      
Registration statement filed, amount $ 50,000,000      
Shares issued (in shares) | shares   6,104    
Total number of shares issued (in shares) | shares   1,514,150    
Stock purchase plan, average price per share (in dollars per share) | $ / shares   $ 19.48    
Stock purchase plan, remaining authorized repurchase amount   $ 33,000,000.0    
Aggregate average price per share (in dollars per share) | $ / shares   $ 21.54    
Proceeds from issuance of common shares   $ 100,000