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Pension and SERP Plans (Components of the Net Periodic Pension Plan Cost) (SERP) (Details) (SERP [Member], USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
SERP [Member]
       
Defined Benefit Plan Disclosure [Line Items]        
Service cost $ 24 $ 30 $ 48 $ 60
Interest cost 57 64 114 128
Amortization of recognized (gain)/ loss (5) 1 (9) 2
Amortization of prior service cost 5 5 10 10
Net pension credit included in employee benefits $ 81 $ 100 $ 163 $ 200