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Loans and Allowance for Loan Credit Losses - Schedule of Amortized Costs by Segment of Loans and Credit Risk Profile of Loan Portfolio (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Total	$ 300,032		$ 300,032		$ 304,144
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Gross charge-offs, Loans	0	$ 0	0	$ 0
Commercial real estate
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	0		0		849
Year before current fiscal year	1,338		1,338		5,521
Two years before current fiscal year	5,458		5,458		9,327
Three years before current year	8,950		8,950		3,713
Four years before current fiscal year	3,500		3,500		8,015
Prior	28,451		28,451		23,818
Revolving Loans	0		0		0
Revolving to Term Loans	3,690		3,690		8,895
Total	51,387		51,387		60,138
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Gross charge-offs, current fiscal year			0		0
Gross charge-offs, year before current fiscal year			0		0
Gross charge-offs, year before current fiscal year			0		0
Gross charge-offs, three years before current year			0		0
Gross charge-offs, four years before current fiscal year			0		0
Gross charge-offs, prior			0		0
Gross charge-offs, Revolving Loans			0		0
Gross charge-offs, Revolving to Term Loans			0		0
Gross charge-offs, Loans	0	0	0	0	0
Commercial real estate | Pass
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	0		0		849
Year before current fiscal year	1,338		1,338		5,521
Two years before current fiscal year	5,458		5,458		9,327
Three years before current year	8,950		8,950		3,713
Four years before current fiscal year	3,500		3,500		8,015
Prior	26,581		26,581		21,875
Revolving Loans	0		0		0
Revolving to Term Loans	3,690		3,690		8,895
Total	49,517		49,517		58,195
Commercial real estate | Special Mention
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	0		0		0
Year before current fiscal year	0		0		0
Two years before current fiscal year	0		0		0
Three years before current year	0		0		0
Four years before current fiscal year	0		0		0
Prior	1,526		1,526		1,570
Revolving Loans	0		0		0
Revolving to Term Loans	0		0		0
Total	1,526		1,526		1,570
Commercial real estate | Substandard
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	0		0		0
Year before current fiscal year	0		0		0
Two years before current fiscal year	0		0		0
Three years before current year	0		0		0
Four years before current fiscal year	0		0		0
Prior	344		344		373
Revolving Loans	0		0		0
Revolving to Term Loans	0		0		0
Total	344		344		373
Commercial real estate | Doubtful
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	0		0		0
Year before current fiscal year	0		0		0
Two years before current fiscal year	0		0		0
Three years before current year	0		0		0
Four years before current fiscal year	0		0		0
Prior	0		0		0
Revolving Loans	0		0		0
Revolving to Term Loans	0		0		0
Total	0		0		0
Commercial real estate | Loss
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	0		0		0
Year before current fiscal year	0		0		0
Two years before current fiscal year	0		0		0
Three years before current year	0		0		0
Four years before current fiscal year	0		0		0
Prior	0		0		0
Revolving Loans	0		0		0
Revolving to Term Loans	0		0		0
Total	0		0		0
Commercial
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	424		424		0
Year before current fiscal year	0		0		573
Two years before current fiscal year	557		557		14
Three years before current year	11		11		42
Four years before current fiscal year	3		3		1,352
Prior	1,389		1,389		309
Revolving Loans	8,760		8,760		10,148
Revolving to Term Loans	0		0		0
Total	11,144		11,144		12,438
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Gross charge-offs, current fiscal year			0		0
Gross charge-offs, year before current fiscal year			0		0
Gross charge-offs, year before current fiscal year			0		0
Gross charge-offs, three years before current year			0		0
Gross charge-offs, four years before current fiscal year			0		0
Gross charge-offs, prior			0		0
Gross charge-offs, Revolving Loans			0		0
Gross charge-offs, Revolving to Term Loans			0		0
Gross charge-offs, Loans	0	0	0	0	0
Commercial | Pass
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	424		424		0
Year before current fiscal year	0		0		573
Two years before current fiscal year	557		557		14
Three years before current year	11		11		42
Four years before current fiscal year	3		3		1,352
Prior	1,389		1,389		309
Revolving Loans	8,760		8,760		10,148
Revolving to Term Loans	0		0		0
Total	11,144		11,144		12,438
Commercial | Special Mention
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	0		0		0
Year before current fiscal year	0		0		0
Two years before current fiscal year	0		0		0
Three years before current year	0		0		0
Four years before current fiscal year	0		0		0
Prior	0		0		0
Revolving Loans	0		0		0
Revolving to Term Loans	0		0		0
Total	0		0		0
Commercial | Substandard
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	0		0		0
Year before current fiscal year	0		0		0
Two years before current fiscal year	0		0		0
Three years before current year	0		0		0
Four years before current fiscal year	0		0		0
Prior	0		0		0
Revolving Loans	0		0		0
Revolving to Term Loans	0		0		0
Total	0		0		0
Commercial | Doubtful
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	0		0		0
Year before current fiscal year	0		0		0
Two years before current fiscal year	0		0		0
Three years before current year	0		0		0
Four years before current fiscal year	0		0		0
Prior	0		0		0
Revolving Loans	0		0		0
Revolving to Term Loans	0		0		0
Total	0		0		0
Commercial | Loss
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	0		0		0
Year before current fiscal year	0		0		0
Two years before current fiscal year	0		0		0
Three years before current year	0		0		0
Four years before current fiscal year	0		0		0
Prior	0		0		0
Revolving Loans	0		0		0
Revolving to Term Loans	0		0		0
Total	0		0		0
Residential real estate closed-end
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	18,574		18,574		20,230
Year before current fiscal year	17,911		17,911		45,920
Two years before current fiscal year	47,541		47,541		45,528
Three years before current year	43,650		43,650		25,150
Four years before current fiscal year	23,600		23,600		18,035
Prior	66,853		66,853		55,495
Revolving Loans	0		0		0
Revolving to Term Loans	0		0		0
Total	218,129		218,129		210,358
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Gross charge-offs, current fiscal year			0		0
Gross charge-offs, year before current fiscal year			0		0
Gross charge-offs, year before current fiscal year			0		0
Gross charge-offs, three years before current year			0		0
Gross charge-offs, four years before current fiscal year			0		0
Gross charge-offs, prior			0		0
Gross charge-offs, Revolving Loans			0		0
Gross charge-offs, Revolving to Term Loans			0		0
Gross charge-offs, Loans	0	0	0	0	0
Residential real estate closed-end | Pass
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	18,574		18,574		20,230
Year before current fiscal year	17,911		17,911		45,920
Two years before current fiscal year	47,541		47,541		45,528
Three years before current year	43,650		43,650		25,150
Four years before current fiscal year	23,600		23,600		18,035
Prior	66,616		66,616		55,253
Revolving Loans	0		0		0
Revolving to Term Loans	0		0		0
Total	217,892		217,892		210,116
Residential real estate closed-end | Special Mention
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	0		0		0
Year before current fiscal year	0		0		0
Two years before current fiscal year	0		0		0
Three years before current year	0		0		0
Four years before current fiscal year	0		0		0
Prior	0		0		0
Revolving Loans	0		0		0
Revolving to Term Loans	0		0		0
Total	0		0		0
Residential real estate closed-end | Substandard
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	0		0		0
Year before current fiscal year	0		0		0
Two years before current fiscal year	0		0		0
Three years before current year	0		0		0
Four years before current fiscal year	0		0		0
Prior	237		237		242
Revolving Loans	0		0		0
Revolving to Term Loans	0		0		0
Total	237		237		242
Residential real estate closed-end | Doubtful
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	0		0		0
Year before current fiscal year	0		0		0
Two years before current fiscal year	0		0		0
Three years before current year	0		0		0
Four years before current fiscal year	0		0		0
Prior	0		0		0
Revolving Loans	0		0		0
Revolving to Term Loans	0		0		0
Total	0		0		0
Residential real estate closed-end | Loss
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	0		0		0
Year before current fiscal year	0		0		0
Two years before current fiscal year	0		0		0
Three years before current year	0		0		0
Four years before current fiscal year	0		0		0
Prior	0		0		0
Revolving Loans	0		0		0
Revolving to Term Loans	0		0		0
Total	0		0		0
Other consumer loans
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	0		0		0
Year before current fiscal year	0		0		0
Two years before current fiscal year	0		0		32
Three years before current year	0		0		0
Four years before current fiscal year	0		0		0
Prior	0		0		0
Revolving Loans	17,869		17,869		17,703
Revolving to Term Loans	1,503		1,503		3,475
Total	19,372		19,372		21,210
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Gross charge-offs, current fiscal year			0		0
Gross charge-offs, year before current fiscal year			0		0
Gross charge-offs, year before current fiscal year			0		0
Gross charge-offs, three years before current year			0		0
Gross charge-offs, four years before current fiscal year			0		0
Gross charge-offs, prior			0		0
Gross charge-offs, Revolving Loans			0		0
Gross charge-offs, Revolving to Term Loans			0		0
Gross charge-offs, Loans	0	$ 0	0	$ 0	0
Other consumer loans | Pass
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	0		0		0
Year before current fiscal year	0		0		0
Two years before current fiscal year	0		0		32
Three years before current year	0		0		0
Four years before current fiscal year	0		0		0
Prior	0		0		0
Revolving Loans	17,869		17,869		17,703
Revolving to Term Loans	1,503		1,503		3,475
Total	19,372		19,372		21,210
Other consumer loans | Special Mention
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	0		0		0
Year before current fiscal year	0		0		0
Two years before current fiscal year	0		0		0
Three years before current year	0		0		0
Four years before current fiscal year	0		0		0
Prior	0		0		0
Revolving Loans	0		0		0
Revolving to Term Loans	0		0		0
Total	0		0		0
Other consumer loans | Substandard
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	0		0		0
Year before current fiscal year	0		0		0
Two years before current fiscal year	0		0		0
Three years before current year	0		0		0
Four years before current fiscal year	0		0		0
Prior	0		0		0
Revolving Loans	0		0		0
Revolving to Term Loans	0		0		0
Total	0		0		0
Other consumer loans | Doubtful
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	0		0		0
Year before current fiscal year	0		0		0
Two years before current fiscal year	0		0		0
Three years before current year	0		0		0
Four years before current fiscal year	0		0		0
Prior	0		0		0
Revolving Loans	0		0		0
Revolving to Term Loans	0		0		0
Total	0		0		0
Other consumer loans | Loss
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	0		0		0
Year before current fiscal year	0		0		0
Two years before current fiscal year	0		0		0
Three years before current year	0		0		0
Four years before current fiscal year	0		0		0
Prior	0		0		0
Revolving Loans	0		0		0
Revolving to Term Loans	0		0		0
Total	$ 0		$ 0		$ 0

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