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Retirement Plans And Other Postretirement Benefits (Schedule Of Amounts Recognized Before Related Deferred Income Taxes In Accumulated Other Comprehensive Income) (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Pension Benefits |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Prior service cost (benefit) | $ 270 | $ (887) | $ (1,890)
Net actuarial (gain) loss | 116,519 | 167,009 | 148,364
Other Post-Retirement Benefits |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Prior service cost (benefit) | 0 | 0 | 0
Net actuarial (gain) loss | $ (1,773) | $ (855) | $ (1,401)

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