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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 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
SERP [Member]
       
Defined Benefit Plan Disclosure [Line Items]        
Service cost $ 23 $ 31 $ 71 $ 91
Interest cost 58 64 172 192
Amortization of recognized (gain)/ loss (4) 1 (13) 3
Amortization of prior service cost 5 5 15 15
Net pension credit included in employee benefits $ 82 $ 101 $ 245 $ 301