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Equity Investees (Schedule Of Balance Sheet Information For Equity Investees) (Details) - USD ($) $ in Thousands | Jun. 30, 2017 | Dec. 31, 2016
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Equity Method Investments and Joint Ventures [Abstract] |  |
Current assets | $ 16,907 | $ 17,111
Fixed assets, net | 224,996 | 232,736
Other assets | 1,287 | 861
Total assets | 243,190 | 250,708
Current liabilities | 20,876 | 20,727
Other liabilities | 227,762 | 219,644
Equity | (5,448) | 10,337
Total liabilities and equity | $ 243,190 | $ 250,708

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