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Capital (Details) - USD ($)
$ / shares in Units, $ in Millions
 1 Months Ended 12 Months Ended
Dec. 30, 2013
Aug. 31, 2014
Dec. 31, 2015
Dec. 31, 2014
Shares and Units [Abstract]        
OP units outstanding (shares)     267,600,000  
OP units owned by the Company (shares)     120,000,000  
OP units owned by the Company, percent     44.90%  
OP units not owned by the Company (shares)     147,600,000  
OP units not owned by the Company, percent     55.10%  
Private perpetual preferred units, liquidation preference per share (in dollars per share)     $ 16.62 $ 16.62
Dividend declared (in dollars per share) $ 0.085      
Private Perpetual Preferred Units [Member]        
Shares and Units [Abstract]        
Private perpetual preferred units issued during period, units, new issues (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    
Private perpetual preferred unit, offering expense   $ 1.4