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Employee Benefits And Deferred Compensation Plans (Estimated Future Benefit Payments, Employee Pension Plan) (Details) - Pension Benefits [Member]
$ in Thousands
Dec. 31, 2017
USD ($)
Defined Benefit Plan Disclosure [Line Items]  
2018 $ 216
2019 214
2020 212
2021 227
2022 261
Year 2023 - 2027 $ 1,629