Debt - Schedule of Debt Maturities (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Scheduled Principal Payments For Borrowings [Line Items]    
Total debt, net $ 4,319,236 $ 4,320,968
Mortgages and Notes Payable    
Scheduled Principal Payments For Borrowings [Line Items]    
Remainder of 2015 252,395  
2016 314,020  
2017 844,643  
2018 291,411  
2019 666,520  
Thereafter 2,053,320  
Total debt, net 4,422,309  
Mortgages and Notes Payable | Scheduled Principal    
Scheduled Principal Payments For Borrowings [Line Items]    
Remainder of 2015 22,363  
2016 29,090  
2017 28,535  
2018 42,560  
2019 44,520  
Thereafter 289,321  
Total debt, net 456,389  
Mortgages and Notes Payable | Balloon Payment    
Scheduled Principal Payments For Borrowings [Line Items]    
Remainder of 2015 230,032  
2016 284,930  
2017 816,108  
2018 248,851  
2019 622,000  
Thereafter 1,763,999  
Total debt, net $ 3,965,920