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Retirement Plans, Postretirement And Postemployment Benefits (Schedule Of Change In Fair Value Of Pension Plan Assets) (Details) (USD $) In Thousands, unless otherwise specified				12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2011 Significant Unobservable Inputs (Level 3) [Member]	Dec. 31, 2010 Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at beginning of year	$ 325,150	$ 311,688	$ 266,846	$ 13,453
Purchases					13,000
Unrealized gain				(474)	453
Fair value of plan assets at end of year	$ 325,150	$ 311,688	$ 266,846	$ 12,979	$ 13,453

Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets.

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