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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, 2021
Mar. 31, 2020
Dec. 31, 2020
Acquired Finite-Lived Intangible Assets [Line Items]      
Amortization expense related to the core deposit intangible assets $ 732 $ 953  
Estimated future amortization expense      
Remainder of 2021 2,017    
2022 1,865    
2023 1,199    
2024 553    
2025 11    
Net Carrying Balance $ 5,645   $ 6,377