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Loans and Allowance for Credit Losses - Loan Portfolio by Impairment Methodology (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans	$ 1,093,511	$ 1,104,959
Ending balance: individually evaluated for impairment	11,006	11,186
Ending balance: collectively evaluated for impairment	1,082,505	1,093,773
Commercial
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans	292,300	295,965
Ending balance: individually evaluated for impairment	7,412	7,402
Ending balance: collectively evaluated for impairment	284,888	288,563
Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans	712,163	716,124
Ending balance: individually evaluated for impairment	2,521	2,616
Ending balance: collectively evaluated for impairment	709,642	713,508
Consumer
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans	89,048	92,870
Ending balance: individually evaluated for impairment	1,073	1,168
Ending balance: collectively evaluated for impairment	$ 87,975	$ 91,702

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