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Loans - Loan Portfolio by Class (Details) - USD ($)	Sep. 30, 2024	Dec. 31, 2023
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	$ 1,909,409,000	$ 1,742,139,000
90+ Days Past Due and Accruing	204,000	128,000
Loans on nonaccrual status	1,729,000	1,298,000
30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	15,185,000	17,498,000
Loans on nonaccrual status	156,000
60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	3,250,000	3,233,000
Loans on nonaccrual status	115,000	22,000
90+ Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	1,421,000	1,290,000
Loans on nonaccrual status	1,220,000	1,160,000
Total Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	19,856,000	22,021,000
Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	1,889,553,000	1,720,118,000
Loans on nonaccrual status	240,000	113,000
Commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	701,647,000	668,122,000
Commercial real estate | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	89,000	92,000
Commercial real estate | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	429,000
Commercial real estate | Total Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	518,000	92,000
Commercial real estate | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	701,129,000	668,030,000
Commercial business
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	115,410,000	115,348,000
90+ Days Past Due and Accruing		1,000
Loans on nonaccrual status	92,000
Commercial business | 90+ Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross		1,000
Commercial business | Total Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross		1,000
Commercial business | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	115,410,000	115,347,000
Construction - commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	155,072,000	69,768,000
Construction - commercial real estate | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	155,072,000	69,768,000
Land acquisition and development
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	33,774,000	29,064,000
Land acquisition and development | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	33,774,000	29,064,000
Builder lines
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	29,664,000	24,668,000
Builder lines | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	29,664,000	24,668,000
Construction - consumer real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	16,874,000	11,223,000
Construction - consumer real estate | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	16,874,000	11,223,000
Residential mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	310,595,000	293,256,000
90+ Days Past Due and Accruing	115,000	89,000
Loans on nonaccrual status	516,000	320,000
Residential mortgage | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	2,042,000	1,643,000
Residential mortgage | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	132,000	387,000
Residential mortgage | 90+ Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	231,000	273,000
Residential mortgage | Total Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	2,405,000	2,303,000
Residential mortgage | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	308,190,000	290,953,000
Equity lines
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	59,406,000	51,592,000
90+ Days Past Due and Accruing	89,000	38,000
Loans on nonaccrual status	20,000	77,000
Equity lines | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross		215,000
Equity lines | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	174,000	103,000
Equity lines | 90+ Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	89,000	115,000
Equity lines | Total Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	263,000	433,000
Equity lines | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	59,143,000	51,159,000
Other consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	9,667,000	10,588,000
Loans on nonaccrual status		9,000
Other consumer | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross		3,000
Other consumer | 90+ Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross		9,000
Other consumer | Total Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross		12,000
Other consumer | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	9,667,000	10,576,000
Consumer finance
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	477,300,000	468,510,000
Consumer finance | Automobiles
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	406,385,000	401,276,000
Loans on nonaccrual status	1,008,000	892,000
Consumer finance | Automobiles | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	12,826,000	15,263,000
Consumer finance | Automobiles | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	2,408,000	2,628,000
Consumer finance | Automobiles | 90+ Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	1,008,000	892,000
Consumer finance | Automobiles | Total Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	16,242,000	18,783,000
Consumer finance | Automobiles | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	390,143,000	382,493,000
Consumer finance | Marine and recreational vehicles
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	70,915,000	67,234,000
Loans on nonaccrual status	93,000
Consumer finance | Marine and recreational vehicles | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	228,000	282,000
Consumer finance | Marine and recreational vehicles | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	107,000	115,000
Consumer finance | Marine and recreational vehicles | 90+ Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	93,000
Consumer finance | Marine and recreational vehicles | Total Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	428,000	397,000
Consumer finance | Marine and recreational vehicles | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	$ 70,487,000	$ 66,837,000

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