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Loans - Loan Portfolio by Class (Details) - USD ($)	Jun. 30, 2024	Dec. 31, 2023
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	$ 1,865,176,000	$ 1,742,139,000
90+ Days Past Due and Accruing	165,000	128,000
Loans on nonaccrual status	1,900,000	1,298,000
30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	16,485,000	17,498,000
Loans on nonaccrual status	105,000
60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	2,518,000	3,233,000
Loans on nonaccrual status	21,000	22,000
90+ Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	1,807,000	1,290,000
Loans on nonaccrual status	1,640,000	1,160,000
Total Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	20,810,000	22,021,000
Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	1,844,366,000	1,720,118,000
Loans on nonaccrual status	131,000	113,000
Commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	701,460,000	668,122,000
Commercial real estate | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross		92,000
Commercial real estate | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	191,000
Commercial real estate | Total Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	191,000	92,000
Commercial real estate | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	701,269,000	668,030,000
Commercial business
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	119,020,000	115,348,000
90+ Days Past Due and Accruing		1,000
Commercial business | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	77,000
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	77,000	1,000
Commercial business | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	118,943,000	115,347,000
Construction - commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	120,208,000	69,768,000
Construction - commercial real estate | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	120,208,000	69,768,000
Land acquisition and development
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	31,355,000	29,064,000
Land acquisition and development | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	31,355,000	29,064,000
Builder lines
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	21,727,000	24,668,000
Builder lines | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	21,727,000	24,668,000
Construction - consumer real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	16,481,000	11,223,000
Loans on nonaccrual status	517,000
Construction - consumer real estate | 90+ Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	517,000
Construction - consumer real estate | Total Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	517,000
Construction - consumer real estate | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	15,964,000	11,223,000
Residential mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	308,790,000	293,256,000
90+ Days Past Due and Accruing	118,000	89,000
Loans on nonaccrual status	531,000	320,000
Residential mortgage | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	2,415,000	1,643,000
Residential mortgage | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	86,000	387,000
Residential mortgage | 90+ Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	391,000	273,000
Residential mortgage | Total Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	2,892,000	2,303,000
Residential mortgage | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	305,898,000	290,953,000
Equity lines
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	56,835,000	51,592,000
90+ Days Past Due and Accruing	47,000	38,000
Loans on nonaccrual status	50,000	77,000
Equity lines | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	192,000	215,000
Equity lines | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross		103,000
Equity lines | 90+ Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	97,000	115,000
Equity lines | Total Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	289,000	433,000
Equity lines | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	56,546,000	51,159,000
Other consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	10,956,000	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	19,000	3,000
Other consumer | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	27,000
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	46,000	12,000
Other consumer | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	10,910,000	10,576,000
Consumer finance
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	478,344,000	468,510,000
Consumer finance | Automobiles
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	406,833,000	401,276,000
Loans on nonaccrual status	780,000	892,000
Consumer finance | Automobiles | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	13,565,000	15,263,000
Consumer finance | Automobiles | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	2,095,000	2,628,000
Consumer finance | Automobiles | 90+ Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	780,000	892,000
Consumer finance | Automobiles | Total Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	16,440,000	18,783,000
Consumer finance | Automobiles | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	390,393,000	382,493,000
Consumer finance | Marine and recreational vehicles
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	71,511,000	67,234,000
Loans on nonaccrual status	22,000
Consumer finance | Marine and recreational vehicles | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	217,000	282,000
Consumer finance | Marine and recreational vehicles | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	119,000	115,000
Consumer finance | Marine and recreational vehicles | 90+ Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	22,000
Consumer finance | Marine and recreational vehicles | Total Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	358,000	397,000
Consumer finance | Marine and recreational vehicles | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, gross	$ 71,153,000	$ 66,837,000

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