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Loans and Allowance for Credit Losses - Loan Portfolio by Impairment Methodology (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Financing Receivable, Allowance for Credit Losses [Line Items]    
Loans $ 1,083,906 $ 1,104,959
Ending balance: individually evaluated for impairment 10,060 11,186
Ending balance: collectively evaluated for impairment 1,073,846 1,093,773
Commercial    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Loans 217,008 295,965
Ending balance: individually evaluated for impairment 8,051 7,402
Ending balance: collectively evaluated for impairment 208,957 288,563
Real Estate    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Loans 773,815 716,124
Ending balance: individually evaluated for impairment 952 2,616
Ending balance: collectively evaluated for impairment 772,863 713,508
Consumer    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Loans 93,083 92,870
Ending balance: individually evaluated for impairment 1,057 1,168
Ending balance: collectively evaluated for impairment $ 92,026 $ 91,702