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Summary of Significant Accounting Policies - Additional Information (Detail)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
USD ($)
Segment
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Summary Of Significant Accounting Policies [Line Items]      
Capitalized costs $ 10,300 $ 11,100 $ 10,900
Impairment charges related to consolidated real estate investment 279,000 38,100 72,600
Interest paid 234,600 243,200 218,400
Capitalized interest paid 6,700 8,700 8,800
Impairment of joint venture investments 1,909 30,652 980
Accounts receivable, unrecoverable amount 6,200 7,200  
Allowance for straight line rent 4,000 3,600  
Straight line rent receivable, net 65,700 63,800  
Stock-based compensation cost recognized by the company 7,000 9,100 7,400
Accelerated vesting of awards due to employee severance charges $ 500 1,400 $ 100
Number of reportable segments | Segment 2    
Quantitative threshold of revenues, profit or loss and assets for identifying reportable segments The Company’s chief operating decision maker may review operational and financial data on a property basis and does not differentiate properties on a geographical basis for purposes of allocating resources or capital. The Company evaluates individual property performance primarily based on net operating income before depreciation, amortization and certain nonrecurring items. Each consolidated shopping center is considered a separate operating segment; however, each shopping center on a stand-alone basis represents less than 10% of revenues, profit or loss, and assets of the combined reported operating segment and meets the majority of the aggregations criteria under the applicable standard.    
Decrease in net assets   $ 22,500  
Geographic Concentration Risk [Member] | Revenues [Member] | Shopping Center [Member] | Stand-Alone Shopping Center [Member] | Maximum [Member]      
Summary Of Significant Accounting Policies [Line Items]      
Percentage of revenues 10.00%