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Loans, Allowance for Credit Losses, and Asset Quality Information - Collateral Dependent Loans (Details) $ in Thousands	Sep. 30, 2021 USD ($)
Loans and Leases Receivable Disclosure [Line Items]
Total Collateral-Dependent Loans	$ 19,246
Residential Property
Loans and Leases Receivable Disclosure [Line Items]
Total Collateral-Dependent Loans	735
Business Assets
Loans and Leases Receivable Disclosure [Line Items]
Total Collateral-Dependent Loans	4,663
Land
Loans and Leases Receivable Disclosure [Line Items]
Total Collateral-Dependent Loans	0
Commercial Property
Loans and Leases Receivable Disclosure [Line Items]
Total Collateral-Dependent Loans	13,848
Other
Loans and Leases Receivable Disclosure [Line Items]
Total Collateral-Dependent Loans	0
Commercial, financial, and agricultural | Accruing 30-59 Days Past Due
Loans and Leases Receivable Disclosure [Line Items]
Total Collateral-Dependent Loans	4,663
Commercial, financial, and agricultural | Accruing 30-59 Days Past Due | Residential Property
Loans and Leases Receivable Disclosure [Line Items]
Total Collateral-Dependent Loans	0
Commercial, financial, and agricultural | Accruing 30-59 Days Past Due | Business Assets
Loans and Leases Receivable Disclosure [Line Items]
Total Collateral-Dependent Loans	4,663
Commercial, financial, and agricultural | Accruing 30-59 Days Past Due | Land
Loans and Leases Receivable Disclosure [Line Items]
Total Collateral-Dependent Loans	0
Commercial, financial, and agricultural | Accruing 30-59 Days Past Due | Commercial Property
Loans and Leases Receivable Disclosure [Line Items]
Total Collateral-Dependent Loans	0
Commercial, financial, and agricultural | Accruing 30-59 Days Past Due | Other
Loans and Leases Receivable Disclosure [Line Items]
Total Collateral-Dependent Loans	0
Real estate, commercial | Accruing 30-59 Days Past Due | Real estate – construction, land development & other land loans
Loans and Leases Receivable Disclosure [Line Items]
Total Collateral-Dependent Loans	0
Real estate, commercial | Accruing 30-59 Days Past Due | Real estate – construction, land development & other land loans | Residential Property
Loans and Leases Receivable Disclosure [Line Items]
Total Collateral-Dependent Loans	0
Real estate, commercial | Accruing 30-59 Days Past Due | Real estate – construction, land development & other land loans | Business Assets
Loans and Leases Receivable Disclosure [Line Items]
Total Collateral-Dependent Loans	0
Real estate, commercial | Accruing 30-59 Days Past Due | Real estate – construction, land development & other land loans | Land
Loans and Leases Receivable Disclosure [Line Items]
Total Collateral-Dependent Loans	0
Real estate, commercial | Accruing 30-59 Days Past Due | Real estate – construction, land development & other land loans | Commercial Property
Loans and Leases Receivable Disclosure [Line Items]
Total Collateral-Dependent Loans	0
Real estate, commercial | Accruing 30-59 Days Past Due | Real estate – construction, land development & other land loans | Other
Loans and Leases Receivable Disclosure [Line Items]
Total Collateral-Dependent Loans	0
Real estate, commercial | Accruing 30-59 Days Past Due | Real estate – mortgage – commercial and other
Loans and Leases Receivable Disclosure [Line Items]
Total Collateral-Dependent Loans	13,848
Real estate, commercial | Accruing 30-59 Days Past Due | Real estate – mortgage – commercial and other | Residential Property
Loans and Leases Receivable Disclosure [Line Items]
Total Collateral-Dependent Loans	0
Real estate, commercial | Accruing 30-59 Days Past Due | Real estate – mortgage – commercial and other | Business Assets
Loans and Leases Receivable Disclosure [Line Items]
Total Collateral-Dependent Loans	0
Real estate, commercial | Accruing 30-59 Days Past Due | Real estate – mortgage – commercial and other | Land
Loans and Leases Receivable Disclosure [Line Items]
Total Collateral-Dependent Loans	0
Real estate, commercial | Accruing 30-59 Days Past Due | Real estate – mortgage – commercial and other | Commercial Property
Loans and Leases Receivable Disclosure [Line Items]
Total Collateral-Dependent Loans	13,848
Real estate, commercial | Accruing 30-59 Days Past Due | Real estate – mortgage – commercial and other | Other
Loans and Leases Receivable Disclosure [Line Items]
Total Collateral-Dependent Loans	0
Real estate, mortgage | Accruing 30-59 Days Past Due | Real estate – mortgage – residential (1-4 family) first mortgages
Loans and Leases Receivable Disclosure [Line Items]
Total Collateral-Dependent Loans	735
Real estate, mortgage | Accruing 30-59 Days Past Due | Real estate – mortgage – residential (1-4 family) first mortgages | Residential Property
Loans and Leases Receivable Disclosure [Line Items]
Total Collateral-Dependent Loans	735
Real estate, mortgage | Accruing 30-59 Days Past Due | Real estate – mortgage – residential (1-4 family) first mortgages | Business Assets
Loans and Leases Receivable Disclosure [Line Items]
Total Collateral-Dependent Loans	0
Real estate, mortgage | Accruing 30-59 Days Past Due | Real estate – mortgage – residential (1-4 family) first mortgages | Land
Loans and Leases Receivable Disclosure [Line Items]
Total Collateral-Dependent Loans	0
Real estate, mortgage | Accruing 30-59 Days Past Due | Real estate – mortgage – residential (1-4 family) first mortgages | Commercial Property
Loans and Leases Receivable Disclosure [Line Items]
Total Collateral-Dependent Loans	0
Real estate, mortgage | Accruing 30-59 Days Past Due | Real estate – mortgage – residential (1-4 family) first mortgages | Other
Loans and Leases Receivable Disclosure [Line Items]
Total Collateral-Dependent Loans	0
Real estate, mortgage | Accruing 30-59 Days Past Due | Real estate – mortgage – home equity loans / lines of credit
Loans and Leases Receivable Disclosure [Line Items]
Total Collateral-Dependent Loans	0
Real estate, mortgage | Accruing 30-59 Days Past Due | Real estate – mortgage – home equity loans / lines of credit | Residential Property
Loans and Leases Receivable Disclosure [Line Items]
Total Collateral-Dependent Loans	0
Real estate, mortgage | Accruing 30-59 Days Past Due | Real estate – mortgage – home equity loans / lines of credit | Business Assets
Loans and Leases Receivable Disclosure [Line Items]
Total Collateral-Dependent Loans	0
Real estate, mortgage | Accruing 30-59 Days Past Due | Real estate – mortgage – home equity loans / lines of credit | Land
Loans and Leases Receivable Disclosure [Line Items]
Total Collateral-Dependent Loans	0
Real estate, mortgage | Accruing 30-59 Days Past Due | Real estate – mortgage – home equity loans / lines of credit | Commercial Property
Loans and Leases Receivable Disclosure [Line Items]
Total Collateral-Dependent Loans	0
Real estate, mortgage | Accruing 30-59 Days Past Due | Real estate – mortgage – home equity loans / lines of credit | Other
Loans and Leases Receivable Disclosure [Line Items]
Total Collateral-Dependent Loans	0
Consumer loans | Accruing 30-59 Days Past Due
Loans and Leases Receivable Disclosure [Line Items]
Total Collateral-Dependent Loans	0
Consumer loans | Accruing 30-59 Days Past Due | Residential Property
Loans and Leases Receivable Disclosure [Line Items]
Total Collateral-Dependent Loans	0
Consumer loans | Accruing 30-59 Days Past Due | Business Assets
Loans and Leases Receivable Disclosure [Line Items]
Total Collateral-Dependent Loans	0
Consumer loans | Accruing 30-59 Days Past Due | Land
Loans and Leases Receivable Disclosure [Line Items]
Total Collateral-Dependent Loans	0
Consumer loans | Accruing 30-59 Days Past Due | Commercial Property
Loans and Leases Receivable Disclosure [Line Items]
Total Collateral-Dependent Loans	0
Consumer loans | Accruing 30-59 Days Past Due | Other
Loans and Leases Receivable Disclosure [Line Items]
Total Collateral-Dependent Loans	$ 0

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