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Retirement Benefit Plans (Tables)
9 Months Ended
Sep. 30, 2015
Retirement Benefit Plans [Abstract]  
Summary Of Net Periodic Benefit Costs
    Supplemental Executive
    Retirement Plans
 
Three Months Ended September 30,   2015   2014
 
Service cost $ 17 $ 16
Interest cost   32   37
Actuarial loss on supplemental executive retirement plan, net of tax   7   7
Net periodic benefit cost $ 56 $ 60

 

    Supplemental Executive
    Retirement Plans
 
Nine Months Ended September 30,   2015   2014
 
Service cost $ 53 $ 48
Interest cost   94   112
Actuarial loss on supplemental executive retirement plan, net of tax   19   21
Net periodic benefit cost $ 166 $ 181