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Qualified affordable housing project investments (Details Textual) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Investment Program, Proportional Amortization Method, Elected [Line Items]
Qualified affordable housing projects	$ 23,100,000		$ 23,100,000		$ 17,900,000
Total unfunded commitments	16,400,000		16,400,000		$ 12,300,000
Amortization expense	407,000	$ 417,000	813,000	$ 834,000
Tax credits and other benefits	$ 502,000	$ 541,000	1,000,000	1,100,000
Impairment losses			$ 0	$ 0

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- Definition

Amount of impairment loss for investment that generates income tax credit and other income tax benefit under tax credit program elected to be accounted for using proportional amortization method. Includes, but is not limited to, investment under tax credit program not meeting condition for accounting under proportional amortization method.

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Amount, before amortization expense, of income tax credit and other tax benefit generated by investment under tax credit program elected to be accounted for using proportional amortization method. Includes, but is not limited to, investment under tax credit program not meeting condition for accounting under proportional amortization method.

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