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Allowance for Credit Losses - Loans - Allowance for credit losses by loan portfolio segment (Details) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023	Mar. 31, 2024	Mar. 31, 2023	Jan. 01, 2023	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for credit losses - Loans	$ 14,611,000	$ 12,221,000	$ 14,611,000	$ 12,221,000	$ 15,053,000	$ 14,639,000	$ 12,132,000		$ 10,743,000
Charge-Offs	(252,000)	(30,000)	(416,000)	(169,000)
Recoveries	41,000	85,000	84,000	108,000
Provision (Recovery)	183,000	34,000	(110,000)	335,000
ASU 2016-13
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for credit losses - Loans								$ 1,200,000
Cumulative Effect, Period of Adoption, Adjustment | ASU 2016-13
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for credit losses - Loans		1,204,000		1,204,000
Other commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for credit losses - Loans	2,678,000	2,849,000	2,678,000	2,849,000	3,030,000	2,667,000	2,873,000
Charge-Offs	(189,000)		(292,000)
Recoveries	9,000	1,000	21,000	2,000
Provision (Recovery)	191,000	(25,000)	(81,000)	(61,000)
Other commercial and industrial | Cumulative Effect, Period of Adoption, Adjustment | ASU 2016-13
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for credit losses - Loans		2,908,000		2,908,000
Other commercial real estate (non-owner occupied)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for credit losses - Loans	4,665,000	3,087,000	4,665,000	3,087,000	3,428,000	4,616,000	3,197,000		5,972,000
Recoveries	3,000	3,000	5,000	7,000
Provision (Recovery)	46,000	(113,000)	1,232,000	(116,000)
Other commercial real estate (non-owner occupied) | Cumulative Effect, Period of Adoption, Adjustment | ASU 2016-13
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for credit losses - Loans		(2,776,000)		(2,776,000)
Residential mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for credit losses - Loans	852,000	1,037,000	852,000	1,037,000	1,021,000	847,000	1,032,000		1,380,000
Recoveries	2,000	1,000	3,000	3,000
Provision (Recovery)	3,000	4,000	(172,000)	9,000
Residential mortgages | Cumulative Effect, Period of Adoption, Adjustment | ASU 2016-13
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for credit losses - Loans		(355,000)		(355,000)
Allocation for general risk
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for credit losses - Loans									653,000
Allocation for general risk | Cumulative Effect, Period of Adoption, Adjustment | ASU 2016-13
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for credit losses - Loans		(653,000)		(653,000)
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Charge-Offs			(292,000)		(3,312,000)
Commercial | Commercial real estate (owner occupied)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for credit losses - Loans	371,000	1,517,000	371,000	1,517,000	1,529,000	416,000	1,320,000
Recoveries	6,000	6,000	12,000	12,000
Provision (Recovery)	(51,000)	191,000	(1,170,000)	125,000
Commercial | Commercial real estate (owner occupied) | Cumulative Effect, Period of Adoption, Adjustment | ASU 2016-13
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for credit losses - Loans		1,380,000		1,380,000
Commercial | Other commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Charge-Offs			(292,000)		(480,000)
Commercial | Commercial real estate (non-owner occupied) - retail
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for credit losses - Loans	3,519,000	1,477,000	3,519,000	1,477,000	3,488,000	3,606,000	1,486,000
Charge-Offs					(2,028,000)
Provision (Recovery)	(87,000)	(9,000)	31,000	45,000
Commercial | Commercial real estate (non-owner occupied) - retail | Cumulative Effect, Period of Adoption, Adjustment | ASU 2016-13
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for credit losses - Loans		1,432,000		1,432,000
Commercial | Commercial real estate (non-owner occupied) - multi-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for credit losses - Loans	1,370,000	1,145,000	1,370,000	1,145,000	1,430,000	1,358,000	1,146,000
Recoveries	1,000	2,000	3,000	3,000
Provision (Recovery)	11,000	(3,000)	(63,000)	(84,000)
Commercial | Commercial real estate (non-owner occupied) - multi-family | Cumulative Effect, Period of Adoption, Adjustment | ASU 2016-13
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for credit losses - Loans		1,226,000		1,226,000
Commercial | Other commercial real estate (non-owner occupied)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Charge-Offs					(804,000)
Commercial | Commercial (owner occupied real estate and other)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for credit losses - Loans									2,653,000
Commercial | Commercial (owner occupied real estate and other) | Cumulative Effect, Period of Adoption, Adjustment | ASU 2016-13
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for credit losses - Loans		(2,653,000)		(2,653,000)
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Charge-Offs			(124,000)		(329,000)
Consumer | Commercial real estate (non-owner occupied) - multi-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for credit losses - Loans					1,430,000
Consumer | Residential mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Charge-Offs					(54,000)
Consumer | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for credit losses - Loans	1,156,000	1,109,000	1,156,000	1,109,000	1,127,000	$ 1,129,000	$ 1,078,000		$ 85,000
Charge-Offs	(63,000)	(30,000)	(124,000)	(169,000)	$ (275,000)
Recoveries	20,000	72,000	40,000	81,000
Provision (Recovery)	$ 70,000	(11,000)	$ 113,000	417,000
Consumer | Consumer | Cumulative Effect, Period of Adoption, Adjustment | ASU 2016-13
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for credit losses - Loans		$ 695,000		$ 695,000

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