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Employee Benefit Plans (Tables)
9 Months Ended
Sep. 30, 2014
Employee Benefit Plans [Abstract]  
Components Of Net Periodic Benefit Expense
Three months ended Nine months ended
September 30, September 30,
2014 2013 2014 2013
Service cost $ 479 $ 516 $ 1,438 $ 1,548
Interest cost on projected benefit obligation 573 505 1,720 1,515
Expected return on plan assets (1,029 ) (921 ) (3,088 ) (2,763 )
Amortization of prior service credit (12 ) (12 ) (36 ) (36 )
Amortization of net actuarial losses 44 341 132 1,023
Net periodic pension expense $ 55 $ 429 $ 166 $ 1,287