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Other Investments (Schedule of Summarized Investee Financial Information) (Details) - Marina Palms - USD ($)
$ in Thousands
6 Months Ended
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