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Investments in and Advances to Joint Ventures - Additional Information (Detail) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2019 USD ($) ShoppingCenter Investment | Mar. 31, 2018 USD ($) | Dec. 31, 2018 USD ($) ShoppingCenter
Schedule Of Equity Method Investments [Line Items] |  |  |
Reserve of preferred equity interests | $ 1,099 | $ 3,961 |
Preferred investment interest valuation allowance | $ 73,500 |  | $ 72,400
Unconsolidated Joint Ventures [Member] |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |
Shopping centers owned | ShoppingCenter | 103 |  | 106
Unconsolidated Joint Ventures [Member] | Shopping Centers [Member] |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |
Number of properties sold | ShoppingCenter | 3 |  |
Proceeds from sale of joint venture assets | $ 92,300 |  |
Gain on sale of joint venture assets | $ 1,600 |  |
BRE DDR Joint Ventures [Member] |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |
Number of unconsolidated investments | Investment | 2 |  |
Maximum preferred investment fixed distribution deferral | 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% |  |
Ownership interest in joint venture | 5.00% |  |
BRE DDR IV [Member] |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |
Ownership interest of joint venture partner | 95.00% |  |
Ownership interest in joint venture | 5.00% |  |

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