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Summary of Significant Accounting Policies - Additional Information (Detail)
$ in Thousands
 12 Months Ended
Dec. 14, 2017
USD ($)
Shoppingcenter
Dec. 31, 2018
Dec. 31, 2017
USD ($)
Segment
Dec. 31, 2016
USD ($)
JointVenture
Dec. 31, 2015
USD ($)
Summary Of Significant Accounting Policies [Line Items]          
Number of shopping centers the company intended to spinoff | Shoppingcenter 50        
Maximum exposure to losses associated with VIEs     $ 284,100 $ 405,400  
Capitalized costs     7,400 8,100 $ 9,100
Interest paid     194,700 220,000 234,600
Capitalized interest paid     1,900 3,100 6,700
Impairment of joint venture investments     0 0 1,909
Net preferred equity interest     277,776 393,338  
Preferred investment interest valuation allowance     61,000    
Accounts receivable, unrecoverable amount     13,600 7,100  
Allowance for straight line rent     4,500 4,100  
Straight line rent receivable, net     59,400 65,100  
Stock-based compensation cost recognized by the company     11,500 7,000 7,000
Accelerated vesting of awards due to employee separation charges     $ 5,500 900 500
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.    
Percentage of lease commission income upon lease execution     50.00%    
Percentage of lease commission income upon tenant rent commencement     50.00%    
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%    
Scenario Forecast [Member]          
Summary Of Significant Accounting Policies [Line Items]          
Corporate statutory tax rate   21.00%      
Real Estate Investment [Member]          
Summary Of Significant Accounting Policies [Line Items]          
Impairment charges related to consolidated real estate investment     $ 340,500 $ 110,900 $ 279,000
Variable Interest Entity, Not Primary Beneficiary [Member]          
Summary Of Significant Accounting Policies [Line Items]          
Number of unconsolidated joint ventures | JointVenture       2  
Retail Value Inc. [Member]          
Summary Of Significant Accounting Policies [Line Items]          
Gross asset value $ 2,900,000        
U.S. [Member]          
Summary Of Significant Accounting Policies [Line Items]          
Number of shopping centers the company intended to spinoff | Shoppingcenter 38        
Puerto Rico [Member]          
Summary Of Significant Accounting Policies [Line Items]          
Number of shopping centers the company intended to spinoff | Shoppingcenter 12