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Investments in and Advances to Joint Ventures - Additional Information (Detail) ft² in Millions | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Nov. 30, 2018 USD ($) ft² | Dec. 31, 2018 USD ($) ShoppingCenter Property | Dec. 31, 2018 USD ($) ShoppingCenter Property Investment | Dec. 31, 2017 USD ($) Property | Dec. 31, 2016 USD ($) Property
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |
Equity method investment, ownership percentage in unconsolidated joint venture |  |  |  |  | 25.00%
Mortgage debt |  | $ 88,743,000 | $ 88,743,000 | $ 641,082,000 |
Gain on disposition of real estate, net |  | $ 182,300,000 | $ 225,406,000 | 161,164,000 | $ 73,386,000
Percentage of net asset sale proceeds generated thereafter expected to available to repay preferred member |  | 100.00% | 100.00% |  |
Preferred investment interest valuation allowance |  | $ 72,400,000 | $ 72,400,000 | 61,000,000 |
Reserve of preferred equity interests |  |  | 11,422,000 | 61,000,000 | 0
Dividend, aggregate amount |  |  | 12,200,000 | 6,300,000 |
Gain (loss) on change in control of interests |  |  | $ 0 | $ 368,000 | $ (1,087,000)
Joint Venture Partner [Member] |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |
Number of properties sold | Property |  |  |  |  | 10
Shopping Centers and Land [Member] |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |
Number of properties sold | Property |  |  | 40 | 15 | 17
Proceeds from sale of joint venture assets |  |  | $ 786,500,000 | $ 545,600,000 | $ 214,600,000
Gain on sale of joint venture assets |  |  | $ 13,700,000 | 5,700,000 | 13,800,000
Dividend Trust Portfolio JV LP [Member] |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |
Number of properties owned | Property |  | 10 | 10 |  |
Number of square feet owned | ft² | 3.4 |  |  |  |
Equity method investment, ownership percentage in unconsolidated joint venture | 20.00% | 20.00% | 20.00% |  |
Unconsolidated joint venture value | $ 607,200,000 |  |  |  |
Mortgage debt | 364,300,000 |  |  |  |
Gain on disposition of real estate, net | $ 186,400,000 |  |  |  |
Unconsolidated Joint Ventures [Member] |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |
Mortgage debt |  | $ 2,212,503,000 | $ 2,212,503,000 | 2,501,163,000 |
Gain on disposition of real estate, net |  |  | $ 93,753,000 | $ 101,806,000 | $ 57,261,000
Unconsolidated Joint Ventures [Member] | Shopping Centers and Land [Member] |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |
Number of properties sold | Property |  |  | 3 |  |
Proceeds from sale of joint venture assets |  |  | $ 35,100,000 |  |
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% | 2.00% |  |
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] |  |  |  |  |
Equity method investment, ownership percentage in unconsolidated joint venture |  | 5.00% | 5.00% |  |
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 |  | $ 58,700,000 | $ 58,700,000 |  |
BRE DDR III [Member] | Preferred Shares [Member] |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |
Remaining net asset sale proceeds |  |  | 52.50% |  |
BRE DDR III [Member] | Common Equity [Member] |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |
Remaining net asset sale proceeds |  |  | 47.50% |  |
BRE DDR IV [Member] |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |
Equity method investment, ownership percentage in unconsolidated joint venture |  | 5.00% | 5.00% |  |
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 |  | $ 13,700,000 | $ 13,700,000 |  |
BRE DDR IV [Member] | Preferred Shares [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 |  |

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