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Employee Benefit Plans (Components of Net Pension Cost (Income)) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Pension Plans And Other Postretirement Benefits [Abstract]    
Service cost benefits earned during the period $ 64 $ 68
Interest cost on projected benefit obligation 279 303
Actual return on assets (441) (416)
Net amortization and deferral
Net periodic pension cost $ (98) $ (45)