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Pension and Other Benefits (Schedule Of Changes In Projected Benefit Obligations) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Pension and Other Benefits [Abstract]      
Project benefit obligation at beginning of year $ 12,345 $ 11,032  
Defined Benefit Plan, Interest Cost 555 589 601
Defined Benefit Plan, Actuarial Gain (Loss) 1,389 1,335  
Defined Benefit Plan, Benefits Paid (756) (611)  
Projected benefit obligation at end of year 13,533 12,345 11,032
Fair value of plan assets at beginning of year 6,762 6,993  
Defined Benefit Plan, Actual Return on Plan Assets 681 (111)  
Defined Benefit Plan Employer Contribtution Of Plan Assets 347 491  
Defined Benefit Plan Benefits Paid On Plan Assets (756) (611)  
Fair value of plan assets at end of year 7,034 6,762 6,993
Defined Benefit Plan, Funded Status of Plan $ (6,499) $ (5,583)