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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 |  |  |

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