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Defined Pension Plans (Narrative) (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Defined Benefit Plan Disclosure [Line Items]    
Pension period 30 years  
Defined Benefit Pension Plan [Member]
   
Defined Benefit Plan Disclosure [Line Items]    
Pension costs $ 410 $ 935
Unfunded Supplemental Executive Retirement Plan [Member]
   
Defined Benefit Plan Disclosure [Line Items]    
Pension costs $ 236 $ 260