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Unconsolidated Entities - Summary of Investments in and Advances to our Unconsolidated Entities (Detail) - USD ($) $ in Thousands | Mar. 31, 2019 | Dec. 31, 2018
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Schedule Of Equity Method Investments [Line Items] |  |
Investments in and advances to unconsolidated entities | $ 5,613,060 | $ 5,745,294
Unconsolidated Co-Investment Ventures [Member] |  |
Schedule Of Equity Method Investments [Line Items] |  |
Investments in and advances to unconsolidated entities | 5,272,073 | 5,407,838
Other Ventures [Member] |  |
Schedule Of Equity Method Investments [Line Items] |  |
Investments in and advances to unconsolidated entities | $ 340,987 | $ 337,456

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- Definition Amount of investment in equity method investee and investment in and advance to affiliate. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.12) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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