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Allowance for Credit Losses - Loans - Allowance for credit losses by loan portfolio segment (Details) - USD ($)	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Jan. 01, 2023	Dec. 31, 2022	Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for credit losses - Loans	$ 12,132,000	$ 11,922,000	$ 11,947,000	$ 10,743,000	$ 12,398,000
Charge-Offs	(139,000)	(117,000)
Recoveries	23,000	41,000
Provision (Credit)	301,000	(400,000)
ASU 2016-13
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for credit losses - Loans	1,200,000		1,200,000
Impact of adopting ASU 2016-13 | ASU 2016-13
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for credit losses - Loans				1,204,000
Other commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for credit losses - Loans	2,873,000		2,908,000
Recoveries	1,000
Provision (Credit)	(36,000)
Other commercial and industrial | Impact of adopting ASU 2016-13 | ASU 2016-13
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for credit losses - Loans				2,908,000
Other commercial real estate (non-owner occupied)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for credit losses - Loans	3,197,000		3,196,000	5,972,000
Recoveries	4,000
Provision (Credit)	(3,000)
Other commercial real estate (non-owner occupied) | Impact of adopting ASU 2016-13 | ASU 2016-13
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for credit losses - Loans				(2,776,000)
Residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for credit losses - Loans	1,032,000	1,465,000	1,025,000	1,380,000	1,590,000
Recoveries	2,000	8,000
Provision (Credit)	5,000	(133,000)
Residential mortgage | Impact of adopting ASU 2016-13 | ASU 2016-13
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for credit losses - Loans				(355,000)
Allocation for general risk
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for credit losses - Loans		1,177,000		653,000	1,232,000
Provision (Credit)		(55,000)
Allocation for general risk | Impact of adopting ASU 2016-13 | ASU 2016-13
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for credit losses - Loans				(653,000)
Commercial | Commercial.
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for credit losses - Loans		3,251,000		2,653,000	3,071,000
Charge-Offs		(72,000)
Provision (Credit)		252,000
Commercial | Commercial real estate (owner occupied)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for credit losses - Loans	1,320,000		1,380,000
Recoveries	6,000
Provision (Credit)	(66,000)
Commercial | Commercial real estate (owner occupied) | Impact of adopting ASU 2016-13 | ASU 2016-13
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for credit losses - Loans				1,380,000
Commercial | Commercial real estate (non-owner occupied)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for credit losses - Loans		5,930,000		5,972,000	6,392,000
Recoveries		13,000
Provision (Credit)		(475,000)
Commercial | Commercial real estate (non-owner occupied) - retail
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for credit losses - Loans	1,486,000		1,432,000
Provision (Credit)	54,000
Commercial | Commercial real estate (non-owner occupied) - retail | Impact of adopting ASU 2016-13 | ASU 2016-13
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for credit losses - Loans				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	1,146,000		1,226,000
Recoveries	1,000
Provision (Credit)	(81,000)
Commercial | Commercial real estate (non-owner occupied) - multi-family | Impact of adopting ASU 2016-13 | ASU 2016-13
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for credit losses - Loans				1,226,000
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) | Impact of adopting ASU 2016-13 | ASU 2016-13
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for credit losses - Loans				(2,653,000)
Consumer.
Accounts, Notes, Loans and Financing Receivable [Line Items]
Charge-Offs	(139,000)
Consumer. | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for credit losses - Loans	1,078,000	99,000	$ 780,000	85,000	$ 113,000
Charge-Offs	(139,000)	(45,000)
Recoveries	9,000	20,000
Provision (Credit)	$ 428,000	$ 11,000
Consumer. | Consumer | Impact of adopting ASU 2016-13 | ASU 2016-13
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for credit losses - Loans				$ 695,000

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

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-Publisher FASB
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-Topic 326
-SubTopic 20
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Amount, excluding accrued interest, of increase in allowance for credit loss on financing receivable from recovery. Excludes net investment in lease.

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