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Other Assets, Net - Components of Other Assets (Detail) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2013
Dec. 31, 2012
Intangible assets:    
Total intangible assets, net $ 131,850 $ 129,280
Other assets:    
Accounts receivable, net 113,934 126,228
Deferred charges, net 41,581 42,498
Prepaid expenses 25,128 12,469
Deposits 10,284 10,580
Other assets 30,443 29,821
Total other assets, net 353,220 350,876
Lease origination costs and fair market value of leases, Acquired-in-Place [Member]
    
Intangible assets:    
Total intangible assets, net 68,745 67,105
Tenant relations, net [Member]
    
Intangible assets:    
Total intangible assets, net $ 63,105 $ 62,175