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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, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Defined Benefit Plan Disclosure [Line Items]    
Total plan assets at fair value $ 209,682 $ 205,401
Contracts with insurance companies 9,353 9,246
Total plan assets 219,035 214,647
Large/Mid-Capitalization Equity Securities [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Total plan assets at fair value 23,845 34,095
Small-Capitalization Equity Securities [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Total plan assets at fair value 11,914 13,281
International And Emerging Market Equity Securities [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Total plan assets at fair value 21,827 30,611
Fixed Income Securities [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Total plan assets at fair value 32,150 20,895
Private Equity And Hedge Funds [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Total plan assets at fair value 109,690 89,620
Other Assets [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Total plan assets at fair value 10,256 16,899
Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Total plan assets at fair value 72,909 98,241
Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] | Large/Mid-Capitalization Equity Securities [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Total plan assets at fair value 23,845 31,490
Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] | Small-Capitalization Equity Securities [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Total plan assets at fair value 11,914 13,281
Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] | International And Emerging Market Equity Securities [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Total plan assets at fair value 8,814 30,611
Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] | Fixed Income Securities [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Total plan assets at fair value 18,080 10,960
Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] | Other Assets [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Total plan assets at fair value 10,256 11,899
Significant Other Observable Inputs (Level 2) [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Total plan assets at fair value 128,417 100,168
Significant Other Observable Inputs (Level 2) [Member] | Large/Mid-Capitalization Equity Securities [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Total plan assets at fair value   2,605
Significant Other Observable Inputs (Level 2) [Member] | International And Emerging Market Equity Securities [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Total plan assets at fair value 13,013  
Significant Other Observable Inputs (Level 2) [Member] | Fixed Income Securities [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Total plan assets at fair value 14,070 9,935
Significant Other Observable Inputs (Level 2) [Member] | Private Equity And Hedge Funds [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Total plan assets at fair value 101,334 82,628
Significant Other Observable Inputs (Level 2) [Member] | Other Assets [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Total plan assets at fair value   5,000
Significant Unobservable Inputs (Level 3) [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Total plan assets at fair value 8,356 6,992
Significant Unobservable Inputs (Level 3) [Member] | Private Equity And Hedge Funds [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Total plan assets at fair value $ 8,356 $ 6,992