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Loans - Classes of Loans (Details) - USD ($) | Mar. 31, 2023 | Dec. 31, 2022 | Mar. 31, 2022 | Dec. 31, 2021
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Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Exclude accrued interest receivable from the amortized cost basis of loans | $ 6,300,000 |  |  |
Subtotal | 1,673,195,000 | $ 1,635,718,000 |  |
Less allowance for credit losses | (40,834,000) | (40,518,000) | $ (39,768,000) | $ (40,157,000)
Loans, net | 1,632,361,000 | 1,595,200,000 |  |
Commercial real estate |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Subtotal | 614,620,000 | 592,301,000 |  |
Commercial business |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Subtotal | 114,722,000 | 118,605,000 |  |
Construction - commercial real estate |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Subtotal | 53,801,000 | 49,136,000 |  |
Land acquisition and development |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Subtotal | 40,214,000 | 37,537,000 |  |
Builder lines |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Subtotal | 32,668,000 | 34,538,000 |  |
Construction - consumer real estate |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Subtotal | 12,552,000 | 10,539,000 |  |
Residential mortgage |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Subtotal | 278,106,000 | 266,267,000 |  |
Less allowance for credit losses |  | (2,622,000) | (2,628,000) | (2,660,000)
Equity lines |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Subtotal | 43,443,000 | 43,300,000 |  |
Less allowance for credit losses |  | (497,000) | (544,000) | (593,000)
Other consumer |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Subtotal | 7,911,000 | 8,938,000 |  |
Amount included related to demand deposit overdrafts | 205,000 | 284,000 |  |
Consumer finance |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Subtotal | 475,158,000 |  |  |
Less allowance for credit losses | (25,875,000) | (25,969,000) | $ (25,099,000) | $ (24,791,000)
Consumer finance | Automobiles |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Subtotal | 409,350,000 | 411,112,000 |  |
Consumer finance | Marine and recreational vehicles |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Subtotal | $ 65,808,000 | $ 63,445,000 |  |

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