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Other Investments (Schedule of Summarized Investee Financial Information) (Details) - Marina Palms - USD ($) $ in Thousands | 6 Months Ended
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Jun. 30, 2017 | Jun. 30, 2016
Equity Method Investments, Summarized Financial Information [Line Items] |  |
Revenues | $ 31,847 | $ 87,494
Expenses | (19,771) | (47,764)
Net Income Attributable to Parent Entities | $ 12,076 | $ 39,730

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