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, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
SERP [Member]
       
Defined Benefit Plan Disclosure [Line Items]        
Service cost $ 30 $ 39 $ 90 $ 119
Interest cost 63 57 189 171
Amortization of recognized loss 3 0 9 0
Amortization of prior service cost 31 32 93 95
Net pension credit included in employee benefits $ 127 $ 128 $ 381 $ 385