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Employee Benefit Plans (Components of the Net Periodic Pension Plan Cost) (Pension) (Details) - Pension [Member] - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Defined Benefit Plan Disclosure [Line Items]        
Service cost $ 81 $ 70 $ 243 $ 210
Interest cost 397 412 1,190 1,237
Expected return on assets (810) (751) (2,430) (2,253)
Amortization of net actuarial loss 300 264 900 792
Amortization of prior service cost 2 3 6 9
Net pension expense/(credit) included in employee benefits $ (30) $ (2) $ (91) $ (5)