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Other Investments (Schedule of Summarized Investee Financial Information) (Details) - Marina Palms - USD ($) $ in Thousands | 9 Months Ended
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Sep. 30, 2017 | Sep. 30, 2016
Equity Method Investments, Summarized Financial Information [Line Items] |  |
Revenues | $ 37,668 | $ 129,697
Expenses | (24,209) | (72,736)
Net Income Attributable to Parent Entities | $ 13,459 | $ 56,961

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