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Senior Unsecured Notes and Secured Debt (Tables)
 6 Months Ended
Jun. 30, 2011
Senior Unsecured Notes And Secured Debt (Tables) [Abstract]  
Principal payments due on debt obligations
                         
    Senior     Secured        
    Unsecured Notes(1)     Debt (1)     Totals  
2011
  $ —     $ 14,545     $ 14,545  
2012
    76,853       101,796       178,649  
2013
    300,000       274,860       574,860  
2014
    —       186,539       186,539  
2015
    250,000       181,087       431,087  
Thereafter
    3,838,077       1,110,302       4,948,379  
 
                 
Totals
  $ 4,464,930     $ 1,869,129     $ 6,334,059  
 
                 
 
(1)   Amounts represent principal amounts due and do not include unamortized premiums/discounts or other fair value adjustments as reflected on the balance sheet.