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Unconsolidated Affiliates and Noncontrolling Interests - Noncontrolling Interests (Details) - USD ($) $ in Thousands | Jun. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Operating Partnership |  |
Schedule of Equity Method Investments [Line Items] |  |
Noncontrolling interests | $ 74,241 | $ 86,773
Other consolidated subsidiaries |  |
Schedule of Equity Method Investments [Line Items] |  |
Noncontrolling interests | 14,261 | 9,701
Unconsolidated Properties |  |
Schedule of Equity Method Investments [Line Items] |  |
Noncontrolling interests | $ 88,502 | $ 96,474

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