Debt Maturities of Mortgages and Notes Payable, Including Balloon Payments (Detail) (USD $)
In Thousands, unless otherwise specified
6 Months Ended
Jun. 30, 2014
Dec. 31, 2013
Scheduled Principal Payments For Borrowings [Line Items]    
Total debt, net $ 3,910,092 $ 3,778,218
Remaining average maturity of outstanding debt 5 years 1 month 6 days  
Mortgages and Notes Payable
   
Scheduled Principal Payments For Borrowings [Line Items]    
Remainder of 2014 46,484  
2015 278,593  
2016 331,071  
2017 933,651  
2018 276,135  
Thereafter 2,094,641  
Total debt, net 3,960,575  
Mortgages and Notes Payable | Scheduled Principal
   
Scheduled Principal Payments For Borrowings [Line Items]    
Remainder of 2014 16,723  
2015 32,799  
2016 31,108  
2017 28,389  
2018 27,284  
Thereafter 96,334  
Total debt, net 232,637  
Mortgages and Notes Payable | Balloon Payment
   
Scheduled Principal Payments For Borrowings [Line Items]    
Remainder of 2014 29,761  
2015 245,794  
2016 299,963  
2017 905,262  
2018 248,851  
Thereafter 1,998,307  
Total debt, net 3,727,938  
Mortgages and Notes Payable | 2019
   
Scheduled Principal Payments For Borrowings [Line Items]    
Thereafter 452,000  
Mortgages and Notes Payable | 2020
   
Scheduled Principal Payments For Borrowings [Line Items]    
Thereafter 288,000  
Mortgages and Notes Payable | 2021
   
Scheduled Principal Payments For Borrowings [Line Items]    
Thereafter 554,800  
Mortgages and Notes Payable | 2022
   
Scheduled Principal Payments For Borrowings [Line Items]    
Thereafter 351,400  
Mortgages and Notes Payable | 2023
   
Scheduled Principal Payments For Borrowings [Line Items]    
Thereafter $ 352,100