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Capital - Narrative (Details) - USD ($)
$ / shares in Units, $ in Millions
 6 Months Ended 12 Months Ended
Aug. 23, 2016
Jun. 30, 2017
Dec. 31, 2016
Class of Stock [Line Items]      
Gross proceeds from sale of shares     $ 621.8
Shares and Units [Abstract]      
OP units outstanding (in shares)   300,417,839  
OP units owned by the Company (in shares)   158,573,500  
OP units owned by the Company (as a percent)   52.80%  
OP units not owned by the Company (in shares)   141,844,339  
OP units not owned by the Company (as a percent)   47.20%  
Dividends on common stock received until performance criteria met for LTIP units (as a percent)   10.00%  
Dividends on common stock received after performance criteria met for LTIP units (as a percent)   90.00%  
Dividends on common stock received in periods after performance criteria met for LTIP units (as a percent)   100.00%  
Series PR operating partnership units      
Shares and Units [Abstract]      
OP units not owned by the Company (in shares)   93,402,012 93,075,441
Common shares | Common class A shares      
Class of Stock [Line Items]      
Issuance of common shares (in shares)     29,610,854
Common shares issued (in dollars per share)     $ 21.00
General partner | Series PR operating partnership units      
Class of Stock [Line Items]      
Issuance of common shares (in shares) 29,610,854   29,610,854
QIA      
Class of Stock [Line Items]      
Economic interest held by QIA 9.90%