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Capital (Details) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Aug. 23, 2016
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Partners' Capital [Line Items]        
Gross proceeds from sale of shares $ 621,800 $ 0 $ 611,206 $ 0
Shares and Units [Abstract]        
OP units outstanding (shares)   300,400,000    
OP units owned by the Company (shares)   161,500,000    
OP units owned by the Company, percent   53.80%    
OP units not owned by the Company (shares)   138,900,000    
OP units not owned by the Company, percent   46.20%    
Percentage of dividends on common stock received until performance criteria met for LTIP units   10.00% 10.00%  
Percentage of dividends on common stock received after performance criteria met for LTIP units   90.00% 90.00%  
Percentage of dividends on common stock received in periods after performance criteria met for LTIP units   100.00% 100.00%  
Private perpetual preferred units, liquidation preference per share (in dollars per share)   $ 16.62 $ 16.62  
Series PR Common Units [Member]        
Shares and Units [Abstract]        
OP units not owned by the Company (shares)   91,759,741 93,075,441  
Private Perpetual Preferred Units [Member]        
Shares and Units [Abstract]        
Private perpetual preferred units (shares)   1,560,360    
Private perpetual preferred units, liquidation preference per share (in dollars per share)   $ 16.62    
Dividend declared (in dollars per share)   $ 0.60    
Common shares [Member] | Common Class A [Member]        
Partners' Capital [Line Items]        
Issuance of common shares (in shares) 29,610,854   29,610,854  
Common shares issued (USD per share) $ 21.00      
General Partner [Member] | Series PR Common Units [Member]        
Partners' Capital [Line Items]        
Issuance of common shares (in shares) 29,610,854   29,611,000  
Q REIT Holding LLC [Member]        
Partners' Capital [Line Items]        
Interest held by subsidiary of QIA 9.90%