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Pension Plan (Components Of Net Periodic Benefit Expense) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]        
Service cost $ 1,342 $ 1,083 $ 2,684 $ 2,166
Interest cost 1,174 1,144 2,348 2,288
Expected return on plan assets (2,855) (2,717) (5,710) (5,434)
Amortization of prior service cost 4 5 8 10
Recognized net actuarial loss 159 0 318 0
Benefit expense $ (176) $ (485) (352) (970)
Pension plan contributions     $ 0 $ 0