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Investments in and Advances to Joint Ventures - Additional Information (Detail)
 1 Months Ended 9 Months Ended
Sep. 30, 2017
USD ($)
ShoppingCenter
Jun. 30, 2017
USD ($)
Asset
Sep. 30, 2017
USD ($)
ShoppingCenter
Investment
Assets
Sep. 30, 2016
USD ($)
Mar. 31, 2017
USD ($)
Dec. 31, 2016
ShoppingCenter
Schedule Of Equity Method Investments [Line Items]            
Preferred investment interest valuation allowance $ 60,600,000   $ 60,600,000   $ 76,000,000  
Preferred investment interest adjusted valuation allowance $ 15,400,000          
Dividend, aggregate amount     4,500,000      
Contribution     69,149,000 $ 1,452,000    
Shopping Centers and Land [Member]            
Schedule Of Equity Method Investments [Line Items]            
Gain on sale of joint venture assets     $ 2,000,000      
Unconsolidated Joint Ventures [Member]            
Schedule Of Equity Method Investments [Line Items]            
Shopping centers owned | ShoppingCenter 142   142     151
BRE DDR Joint Ventures [Member]            
Schedule Of Equity Method Investments [Line Items]            
Number of unconsolidated investments | Investment     2      
Maximum preferred investment fixed distribution deferral 23.50%   23.50%      
Redemption of preferred equity in full or in part at partners option     during the first three years      
Redemption of preferred investment in full at company option     after seven years      
Dividend, cash interest rate     6.50%      
Dividend, accrued PIK interest rate     2.00%      
BRE DDR Joint Ventures [Member] | Preferred Equity Fixed Dividend Rate [Member]            
Schedule Of Equity Method Investments [Line Items]            
Preferred equity fixed dividend rate per annum     8.50%      
BRE DDR III [Member]            
Schedule Of Equity Method Investments [Line Items]            
Ownership interest of joint venture partner 95.00%   95.00%      
Ownership interest in joint venture 5.00%   5.00%      
Redemption of preferred investment in full at company option year     2021      
Preferred investment interest valuation allowance         70,000,000  
Preferred investment interest adjusted valuation allowance $ (18,100,000)          
BRE DDR III [Member] | Shopping Centers and Land [Member]            
Schedule Of Equity Method Investments [Line Items]            
Number of properties sold | Assets     8      
Proceeds from sale of joint venture assets     $ 164,300,000      
Gain on sale of joint venture assets     $ 30,900,000      
BRE DDR III [Member] | Preferred Equity [Member]            
Schedule Of Equity Method Investments [Line Items]            
Remaining net asset sale proceeds 51.90%          
BRE DDR IV [Member]            
Schedule Of Equity Method Investments [Line Items]            
Ownership interest of joint venture partner 95.00%   95.00%      
Ownership interest in joint venture 5.00%   5.00%      
Redemption of preferred investment in full at company option year     2022      
Minimum net asset sales threshold payable $ 4,900,000   $ 4,900,000      
Preferred investment interest valuation allowance         $ 6,000,000  
Preferred investment interest adjusted valuation allowance $ 2,700,000          
BRE DDR IV [Member] | Preferred Equity [Member]            
Schedule Of Equity Method Investments [Line Items]            
Number of assets with nominal interest | ShoppingCenter 3   3      
Minimum net asset sales threshold payable $ 1,100,000   $ 1,100,000      
DDRM Properties [Member]            
Schedule Of Equity Method Investments [Line Items]            
Properties Owned | Asset   52        
Transaction Value at 100%   $ 1,050,000,000        
Percentage of ownership acquired/ transferred   80.00%        
DDR interest   20.00%        
New financing 100%   $ 706,700,000        
DDR pro rata share new financing   $ 141,300,000        
Debt instrument maturity date   2022-07        
Contribution   $ 46,900,000        
DDR Domestic Retail Fund I [Member]            
Schedule Of Equity Method Investments [Line Items]            
Properties Owned | Asset   3        
DDR interest   20.00%        
Aggregate book value   $ 74,000,000        
Pro rata Aggregate book value   $ 14,800,000        
DDRTC Core Retail Fund [Member] | Shopping Centers and Land [Member]            
Schedule Of Equity Method Investments [Line Items]            
Number of properties sold | Assets     1      
Proceeds from sale of joint venture assets     $ 17,700,000