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Other Liabilities (Schedule Of Other Liabilities) (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2012 | Dec. 31, 2011
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Other Liabilities [Abstract] |  |
Environmental | $ 33,825 | $ 49,959
Other | 43,046 | 26,756
Total other liabilities | $ 76,871 | $ 76,715

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