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Employee Benefits Plans (Fair Value Of The Plan's Level 3 Assets) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Defined Benefit Plan Disclosure [Line Items]
Balance, beginning of year	$ 60,953	$ 70,189	$ 72,969
Balance, end of year	60,953	70,189	72,969
Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Balance, beginning of year	810	582
Unrealized gains (losses) relating to instruments still held at the reporting date	228
Balance, end of year	$ 810	$ 582

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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