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Employee Benefit Plans (Components of the Net Periodic Pension Plan Cost) (SERP) (Details) - SERP [Member] - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Defined Benefit Plan Disclosure [Line Items]        
Service cost $ 23 $ 28 $ 47 $ 56
Interest cost 83 75 165 150
Amortization of recognized loss 29 41 58 81
Amortization of prior service cost     (1) (1)
Net pension expense/(credit) included in employee benefits and other expense $ 135 $ 144 $ 269 $ 286