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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, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	$ 15,367		$ 15,367		$ 19,262
Year before current fiscal year	18,776		18,776		20,360
Two years before current fiscal year	18,435		18,435		55,889
Three years before current year	50,818		50,818		51,978
Four years before current fiscal year	49,667		49,667		26,569
Prior	107,820		107,820		92,298
Revolving Loans	21,378		21,378		45,108
Revolving to Term Loans	1,823		1,823		1,823
Total	284,084		284,084		313,287
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
Pass
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	15,367		15,367		19,262
Year before current fiscal year	18,776		18,776		20,360
Two years before current fiscal year	18,435		18,435		54,213
Three years before current year	49,173		49,173		50,402
Four years before current fiscal year	47,670		47,670		26,569
Prior	106,052		106,052		90,218
Revolving Loans	21,378		21,378		45,108
Revolving to Term Loans	1,823		1,823		1,823
Total	278,674		278,674		307,955
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		1,576
Four years before current fiscal year	1,497		1,497		0
Prior	0		0		0
Revolving Loans	0		0		0
Revolving to Term Loans	0		0		0
Total	1,497		1,497		1,576
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		1,676
Three years before current year	1,645		1,645		0
Four years before current fiscal year	500		500		0
Prior	1,768		1,768		2,081
Revolving Loans	0		0		0
Revolving to Term Loans	0		0		0
Total	3,913		3,913		3,757
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
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 real estate
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	4,492		4,492		2,873
Year before current fiscal year	2,824		2,824		2,526
Two years before current fiscal year	2,492		2,492		8,137
Three years before current year	4,734		4,734		8,826
Four years before current fiscal year	8,432		8,432		3,424
Prior	26,087		26,087		27,694
Revolving Loans	0		0		0
Revolving to Term Loans	0		0		0
Total	49,061		49,061		53,480
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	4,492		4,492		2,873
Year before current fiscal year	2,824		2,824		2,526
Two years before current fiscal year	2,492		2,492		6,461
Three years before current year	3,089		3,089		7,250
Four years before current fiscal year	6,435		6,435		3,424
Prior	24,319		24,319		25,849
Revolving Loans	0		0		0
Revolving to Term Loans	0		0		0
Total	43,651		43,651		48,383
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		1,576
Four years before current fiscal year	1,497		1,497		0
Prior	0		0		0
Revolving Loans	0		0		0
Revolving to Term Loans	0		0		0
Total	1,497		1,497		1,576
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		1,676
Three years before current year	1,645		1,645		0
Four years before current fiscal year	500		500		0
Prior	1,768		1,768		1,845
Revolving Loans	0		0		0
Revolving to Term Loans	0		0		0
Total	3,913		3,913		3,521
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	222		222		403
Year before current fiscal year	338		338		0
Two years before current fiscal year	0		0		552
Three years before current year	535		535		9
Four years before current fiscal year	6		6		0
Prior	987		987		1,147
Revolving Loans	2,330		2,330		25,772
Revolving to Term Loans	0		0		0
Total	4,418		4,418		27,883
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	222		222		403
Year before current fiscal year	338		338		0
Two years before current fiscal year	0		0		552
Three years before current year	535		535		9
Four years before current fiscal year	6		6		0
Prior	987		987		1,147
Revolving Loans	2,330		2,330		25,772
Revolving to Term Loans	0		0		0
Total	4,418		4,418		27,883
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	10,605		10,605		15,969
Year before current fiscal year	15,602		15,602		17,834
Two years before current fiscal year	15,943		15,943		47,200
Three years before current year	45,549		45,549		43,125
Four years before current fiscal year	41,218		41,218		23,145
Prior	80,746		80,746		63,458
Revolving Loans	0		0		0
Revolving to Term Loans	0		0		0
Total	209,663		209,663		210,730
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	10,605		10,605		15,969
Year before current fiscal year	15,602		15,602		17,834
Two years before current fiscal year	15,943		15,943		47,200
Three years before current year	45,549		45,549		43,125
Four years before current fiscal year	41,218		41,218		23,145
Prior	80,746		80,746		63,222
Revolving Loans	0		0		0
Revolving to Term Loans	0		0		0
Total	209,663		209,663		210,495
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	0		0		236
Revolving Loans	0		0		0
Revolving to Term Loans	0		0		0
Total	0		0		236
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	48		48		17
Year before current fiscal year	12		12		0
Two years before current fiscal year	0		0		0
Three years before current year	0		0		18
Four years before current fiscal year	11		11		0
Prior	0		0		0
Revolving Loans	19,048		19,048		19,336
Revolving to Term Loans	1,823		1,823		1,823
Total	20,942		20,942		21,194
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	48		48		17
Year before current fiscal year	12		12		0
Two years before current fiscal year	0		0		0
Three years before current year	0		0		18
Four years before current fiscal year	11		11		0
Prior	0		0		0
Revolving Loans	19,048		19,048		19,336
Revolving to Term Loans	1,823		1,823		1,823
Total	20,942		20,942		21,194
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

X

- Definition

Amount, excluding accrued interest, of decrease in allowance for credit loss on financing receivable from writeoff. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
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-Publisher FASB
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Amortized cost excluding accrued interest, before allowance for credit loss, of financing receivable. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
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-Name Accounting Standards Codification
-Section 45
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Amortized cost excluding accrued interest, of financing receivable that can be withdrawn, repaid, and redrawn.

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