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Other Assets, Net - Components of Other Assets (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Dec. 31, 2012
Finite-Lived Intangible Assets [Line Items]    
Total intangible assets, net $ 181,843 $ 129,280
Accounts receivable, net 119,061 126,228
Deferred charges, net 38,367 42,498
Prepaid expenses 15,850 12,469
Other assets 44,042 29,821
Deposits 35,495 10,580
Total other assets, net 434,658 350,876
Lease Origination Costs and Fair Market Value of Leases, Acquired-in-Place [Member]
    
Finite-Lived Intangible Assets [Line Items]    
Total intangible assets, net 102,485 67,105
Tenant Relations, Net [Member]
    
Finite-Lived Intangible Assets [Line Items]    
Total intangible assets, net $ 79,358 $ 62,175