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Pension And Postretirement Benefit Plans (Schedule Of Funded Status For The Pension And Postretirement Benefit Plans) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Pension Plan [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Funded status      $ (432)
Unrecognized net actuarial loss       
Unrecognized net transition obligation       
Unrecognized prior service cost       
Accrued benefits      (432)
Prepaid benefit cost       
Accrued liability      (432)
Amounts Recognized in Consolidated Balance Sheets      (432)
Net actuarial loss (gain)      434
Net transition obligation       
Deferred tax (benefit)/liability      (147)
Amounts recognized in Accumulated Other Comprehensive Income      287
Postretirement Benefits Plan [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Funded status (150) (150) (144)
Accrued benefits (150) (150) (144)
Accrued liability (150) (150) (144)
Amounts Recognized in Consolidated Balance Sheets (150) (150) (144)
Net actuarial loss (gain) (65) (76) (93)
Deferred tax (benefit)/liability 21 25 30
Amounts recognized in Accumulated Other Comprehensive Income $ (44) $ (51) $ (63)