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Allowance for Credit Losses - Loans - Additional information (Details)	1 Months Ended	3 Months Ended		9 Months Ended		12 Months Ended
	Jun. 30, 2025 USD ($)	Sep. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2025 USD ($) borrower loan	Sep. 30, 2024 USD ($)	Dec. 31, 2025	Dec. 31, 2024 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Provision (Recovery)		$ 323,000	$ (35,000)	$ 3,443,000	$ (145,000)
Financing receivable excluding accrued interest allowance for credit loss period increase decrease				3,600,000
Charge-Offs	$ 2,800,000	$ 7,000	204,000	3,088,000	620,000
Net loan charge-offs				2,900,000	$ 488,000
Sale of other real estate owned (OREO) property				$ 1,500,000
Percentage of charge-offs				0.37%	0.06%
Percentage of coverage on non-performing assets		98.00%		98.00%			127.00%
Percentage Of Allowance For Total Loans		1.36%		1.36%			1.30%
Percentage of general reserve		41.00%
Percentage of quantitative reserve		59.00%
Evaluated for impairment		$ 150,000		$ 150,000
Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Minimum individual loan balance requiring quarterly review		2,000,000		2,000,000
Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Minimum individual loan balance requiring quarterly review		250,000		250,000
Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Minimum individual loan balance requiring quarterly review		250,000		250,000
Doubtful
Accounts, Notes, Loans and Financing Receivable [Line Items]
Minimum individual loan balance requiring quarterly review		100,000		100,000
Other commercial real estate (non-owner occupied)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Provision (Recovery)		(257,000)	(27,000)	3,365,000	$ 1,205,000
Charge-Offs				2,762,000
Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Charge-Offs				2,962,000			$ 1,998,000
Commercial Portfolio Segment | Commercial loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Minimum aggregate balances for commercial loan relationship under structure loan rating process		1,000,000		1,000,000
Commercial Portfolio Segment | Commercial loan | Subsequent event
Accounts, Notes, Loans and Financing Receivable [Line Items]
Minimum percent of portfolio to be reviewed						36.00%
Commercial Portfolio Segment | Other commercial real estate (non-owner occupied)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Charge-Offs				2,762,000			1,571,000
Commercial Portfolio Segment | Commercial real estate (non-owner occupied) - retail
Accounts, Notes, Loans and Financing Receivable [Line Items]
Provision (Recovery)		(23,000)	$ (68,000)	(202,000)	$ (37,000)
Non-performing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total non-performing assets		$ 14,953,000		$ 14,953,000			12,657,000
Number of loans transferred | loan				5
Number Of Borrowers | borrower				1
CRE loan transferred into non-accrual status				$ 6,700,000
Non-performing assets as a percent of loans		1.42%		1.42%
Non-performing | Other commercial real estate (non-owner occupied)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total non-performing assets		$ 5,539,000		$ 5,539,000			$ 10,249,000
Non-performing | Commercial Portfolio Segment | Commercial real estate (non-owner occupied) - retail
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total non-performing assets		$ 606,000		$ 606,000

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- Definition

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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