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Retirement And Benefit Plans (Change In Fair Value Of Pension Plan Assets) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011
Retirement And Benefit Plans [Abstract]
Fair value of plan assets at beginning of year	$ 5,357
Benefit payments and administrative expenses	(10)
Investment income and net appreciation in investments	315
Fair value of plan assets at end of year	$ 5,662

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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