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Unconsolidated Affiliates and Noncontrolling Interests (Variable Interest Entities) (Details) | Jun. 30, 2017 USD ($)
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Ambassador Infrastructure, LLC |
Noncontrolling Interest [Line Items] |
Investment in Real Estate Joint Ventures and Partnerships | $ 0
Maximum Risk of Loss | $ 11,035
Percentage of debt guaranteed | 100.00%
G&I VIII CBL Triangle LLC |
Noncontrolling Interest [Line Items] |
Investment in Real Estate Joint Ventures and Partnerships | $ 2,103
Maximum Risk of Loss | $ 2,103

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