Quarterly report pursuant to Section 13 or 15(d)

Real Estate Held for Sale and Impairment Charges - Components of Assets and Liabilities Held for Sale (Detail)

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Real Estate Held for Sale and Impairment Charges - Components of Assets and Liabilities Held for Sale (Detail) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2014
Dec. 31, 2013
Schedule Of Real Estate Owned Held For Sale [Line Items]    
Real estate held for sale, cost $ 627,993 $ 642,353
Less: Accumulated depreciation (84,008) (81,241)
Total real estate, net 543,985 561,112
Deferred rent receivable 19,520 18,905
Other liabilities related to assets held for sale 178  
Real Estate Held for Sale [Member]
   
Schedule Of Real Estate Owned Held For Sale [Line Items]    
Less: Accumulated depreciation (1,645)  
Total real estate, net 9,709  
Deferred rent receivable 223  
Real estate and related assets held for sale, net 9,932  
Other liabilities related to assets held for sale 178  
Land [Member] | Real Estate Held for Sale [Member]
   
Schedule Of Real Estate Owned Held For Sale [Line Items]    
Real estate held for sale, cost 2,735  
Building and Improvements [Member] | Real Estate Held for Sale [Member]
   
Schedule Of Real Estate Owned Held For Sale [Line Items]    
Real estate held for sale, cost $ 8,619