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Pension Plan (Schedule of Accumulated Other Comprehensive Loss) (Details) (Pension Benefits [Member], USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Pension Benefits [Member]
   
Amounts recognized in accumulated other comprehensive income    
Unrecognized prior service cost $ 120 $ 129
Unrecognized net actuarial loss 84 97
Unrecognized transitional obligation 1,542 1,182
Deferred income taxes (507) (415)
Accumulated other comprehensive loss $ 1,239 $ 993