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Loans - Classes of Loans (Details) - USD ($) | Sep. 30, 2024 | Dec. 31, 2023 | Sep. 30, 2023 | Dec. 31, 2022
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Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Exclude accrued interest receivable from the amortized cost basis of loans | $ 7,930,000 | $ 7,650,000 |  |
Subtotal | 1,909,409,000 | 1,742,139,000 |  |
Less allowance for credit losses | (40,771,000) | (39,651,000) | $ (40,248,000) | $ (40,518,000)
Loans, net | 1,868,638,000 | 1,702,488,000 |  |
Commercial real estate |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Subtotal | 701,647,000 | 668,122,000 |  |
Commercial business |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Subtotal | 115,410,000 | 115,348,000 |  |
Construction - commercial real estate |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Subtotal | 155,072,000 | 69,768,000 |  |
Land acquisition and development |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Subtotal | 33,774,000 | 29,064,000 |  |
Builder lines |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Subtotal | 29,664,000 | 24,668,000 |  |
Construction - consumer real estate |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Subtotal | 16,874,000 | 11,223,000 |  |
Residential mortgage |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Subtotal | 310,595,000 | 293,256,000 |  |
Equity lines |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Subtotal | 59,406,000 | 51,592,000 |  |
Other consumer |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Subtotal | 9,667,000 | 10,588,000 |  |
Amount included related to demand deposit overdrafts | 210,000 | 228,000 |  |
Consumer finance |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Subtotal | 477,300,000 | 468,510,000 |  |
Less allowance for credit losses | (23,238,000) | (23,578,000) | $ (24,389,000) | $ (25,969,000)
Consumer finance | Automobiles |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Subtotal | 406,385,000 | 401,276,000 |  |
Consumer finance | Marine and recreational vehicles |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Subtotal | $ 70,915,000 | $ 67,234,000 |  |

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