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Other Liabilities (Schedule Of Other Liabilities) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Other Liabilities [Abstract]
Environmental	$ 49,959	$ 27,675
Other	26,756	21,860
Other Liabilities, Total	$ 76,715	$ 49,535

Carrying value of the obligation (known or estimated) arising from requirements to perform activities to remediate one or more sites, payable after twelve months or beyond the next operating cycle if longer.

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