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Goodwill and Other Intangible Assets (Amortization Expense of Core Deposit Intangibles and Estimated Future Amortization Expense ) (Details) - Core Deposit Intangibles - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Acquired Finite-Lived Intangible Assets [Line Items]      
Amortization expense $ 953 $ 1,200  
Year Ended December 31,      
Remainder of 2020 2,681    
2021 2,749    
2022 1,865    
2023 1,199    
2024 553    
Thereafter 11    
Net carrying balance $ 9,058   $ 10,011