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Goodwill And Other Intangible Assets (Estimated Core Deposit Intangible Amortization Expense) (Details)
$ in Thousands
Dec. 31, 2017
USD ($)
Goodwill And Other Intangible Assets [Abstract]  
2018 $ 1,112
2019 1,011
2020 909
2021 803
2022 $ 725