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Retirement Plans And Other Postretirement Benefits (Schedule Of Pension Plan Assets Categorized By Level Within Fair Value Measurement Hierarchy) (Details) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Defined Benefit Plan Disclosure [Line Items]    
Contracts with insurance companies $ 10,207 $ 10,267
Total plan assets 210,642 229,017
Large/mid-capitalization equity securities    
Defined Benefit Plan Disclosure [Line Items]    
Total plan assets at fair value 29,027 31,401
Small-capitalization equity securities    
Defined Benefit Plan Disclosure [Line Items]    
Total plan assets at fair value 8,457 9,827
International and emerging market equity securities    
Defined Benefit Plan Disclosure [Line Items]    
Total plan assets at fair value 23,054 25,224
Fixed income securities    
Defined Benefit Plan Disclosure [Line Items]    
Total plan assets at fair value 22,968 28,714
Private equity and hedge funds    
Defined Benefit Plan Disclosure [Line Items]    
Total plan assets at fair value 110,340 117,276
Fixed Income Security NAV [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Total plan assets at fair value 3,862 4,567
Other assets    
Defined Benefit Plan Disclosure [Line Items]    
Total plan assets at fair value 2,727 1,741
Total Plan Assets at Fair Value [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Total plan assets at fair value 86,233 96,907
Quoted Prices in Active Markets for Identical Assets (Level 1)    
Defined Benefit Plan Disclosure [Line Items]    
Total plan assets at fair value 60,963 67,101
Quoted Prices in Active Markets for Identical Assets (Level 1) | Large/mid-capitalization equity securities    
Defined Benefit Plan Disclosure [Line Items]    
Total plan assets at fair value 29,027 31,401
Quoted Prices in Active Markets for Identical Assets (Level 1) | Small-capitalization equity securities    
Defined Benefit Plan Disclosure [Line Items]    
Total plan assets at fair value 8,457 9,827
Quoted Prices in Active Markets for Identical Assets (Level 1) | International and emerging market equity securities    
Defined Benefit Plan Disclosure [Line Items]    
Total plan assets at fair value 10,126 11,471
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fixed income securities    
Defined Benefit Plan Disclosure [Line Items]    
Total plan assets at fair value 10,626 12,661
Quoted Prices in Active Markets for Identical Assets (Level 1) | Other assets    
Defined Benefit Plan Disclosure [Line Items]    
Total plan assets at fair value 2,727 1,741
Significant Other Observable Inputs (Level 2)    
Defined Benefit Plan Disclosure [Line Items]    
Total plan assets at fair value 25,270 29,806
Significant Other Observable Inputs (Level 2) | Large/mid-capitalization equity securities    
Defined Benefit Plan Disclosure [Line Items]    
Total plan assets at fair value 0 0
Significant Other Observable Inputs (Level 2) | Small-capitalization equity securities    
Defined Benefit Plan Disclosure [Line Items]    
Total plan assets at fair value 0 0
Significant Other Observable Inputs (Level 2) | International and emerging market equity securities    
Defined Benefit Plan Disclosure [Line Items]    
Total plan assets at fair value 12,928 13,753
Significant Other Observable Inputs (Level 2) | Fixed income securities    
Defined Benefit Plan Disclosure [Line Items]    
Total plan assets at fair value 12,342 16,053
Significant Other Observable Inputs (Level 2) | Other assets    
Defined Benefit Plan Disclosure [Line Items]    
Total plan assets at fair value 0 0
Significant Unobservable Inputs (Level 3)    
Defined Benefit Plan Disclosure [Line Items]    
Total plan assets at fair value 0 0
Significant Unobservable Inputs (Level 3) | Large/mid-capitalization equity securities    
Defined Benefit Plan Disclosure [Line Items]    
Total plan assets at fair value 0 0
Significant Unobservable Inputs (Level 3) | Small-capitalization equity securities    
Defined Benefit Plan Disclosure [Line Items]    
Total plan assets at fair value 0 0
Significant Unobservable Inputs (Level 3) | International and emerging market equity securities    
Defined Benefit Plan Disclosure [Line Items]    
Total plan assets at fair value 0 0
Significant Unobservable Inputs (Level 3) | Fixed income securities    
Defined Benefit Plan Disclosure [Line Items]    
Total plan assets at fair value 0 0
Significant Unobservable Inputs (Level 3) | Other assets    
Defined Benefit Plan Disclosure [Line Items]    
Total plan assets at fair value $ 0 $ 0