Loans and allowance for loan losses - Average recorded investment in impaired loans (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2024	Mar. 31, 2023
With no related allowance recorded
Average Recorded Investment, after ASU 2016-13	$ 286	$ 5,898
Interest Income Recognized, after ASU 2016-13	7	26
With an allowance recorded
Average Recorded Investment, after ASU 2016-13		301
Total
Average Recorded Investment, after ASU 2016-13	286	6,199
Interest Income Recognized, after ASU 2016-13	7	26
Consumer and other
With an allowance recorded
Average Recorded Investment, after ASU 2016-13		16
Commercial real estate
With no related allowance recorded
Average Recorded Investment, after ASU 2016-13		3,964
Interest Income Recognized, after ASU 2016-13		16
With an allowance recorded
Average Recorded Investment, after ASU 2016-13		191
Total
Average Recorded Investment, after ASU 2016-13		4,155
Interest Income Recognized, after ASU 2016-13		16
Commercial real estate \| Owner occupied
With no related allowance recorded
Average Recorded Investment, after ASU 2016-13		3,468
Interest Income Recognized, after ASU 2016-13		16
With an allowance recorded
Average Recorded Investment, after ASU 2016-13		191
Total
Average Recorded Investment, after ASU 2016-13		3,659
Interest Income Recognized, after ASU 2016-13		16
Commercial real estate \| Non-owner occupied
With no related allowance recorded
Average Recorded Investment, after ASU 2016-13		496
Total
Average Recorded Investment, after ASU 2016-13		496
Commercial real estate \| Home equity lines
With no related allowance recorded
Average Recorded Investment, after ASU 2016-13		300
Interest Income Recognized, after ASU 2016-13		6
Consumer real estate secured by 1-4 family residential
With no related allowance recorded
Average Recorded Investment, after ASU 2016-13	263	1,880
Interest Income Recognized, after ASU 2016-13	7	9
With an allowance recorded
Average Recorded Investment, after ASU 2016-13		94
Total
Average Recorded Investment, after ASU 2016-13	263	1,974
Interest Income Recognized, after ASU 2016-13	7	9
Consumer real estate secured by 1-4 family residential \| Home equity lines
Total
Average Recorded Investment, after ASU 2016-13		300
Interest Income Recognized, after ASU 2016-13		6
Consumer real estate secured by 1-4 family residential \| First deed of trust
With no related allowance recorded
Average Recorded Investment, after ASU 2016-13	160	1,394
Interest Income Recognized, after ASU 2016-13	2	2
With an allowance recorded
Average Recorded Investment, after ASU 2016-13		86
Total
Average Recorded Investment, after ASU 2016-13	160	1,480
Interest Income Recognized, after ASU 2016-13	2	2
Consumer real estate secured by 1-4 family residential \| Second deed of trust
With no related allowance recorded
Average Recorded Investment, after ASU 2016-13	103	186
Interest Income Recognized, after ASU 2016-13	5	1
With an allowance recorded
Average Recorded Investment, after ASU 2016-13		8
Total
Average Recorded Investment, after ASU 2016-13	103	194
Interest Income Recognized, after ASU 2016-13	5	1
Commercial and industrial loans \| Commercial and industrial loans (except those secured by real estate)
With no related allowance recorded
Average Recorded Investment, after ASU 2016-13	23	54
Interest Income Recognized, after ASU 2016-13		1
Total
Average Recorded Investment, after ASU 2016-13	$ 23	54
Interest Income Recognized, after ASU 2016-13		1
Consumer and other
Total
Average Recorded Investment, after ASU 2016-13		$ 16

- Definition

Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

+ References

No definition available.

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- Definition

Amount of interest income recognized that the financing receivables (with related allowance for credit losses and without a related allowance for credit losses) were impaired.

+ References

No definition available.

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- Definition

Amount of average investment of impaired financing receivables for which there is no related allowance for credit losses.

+ References

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- Definition

Amount of average investment of impaired financing receivables for which there is a related allowance for credit losses.

+ References

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- Definition

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- Definition

Amount of interest income, recognized on accrual basis, on financing receivables that are recognized as impaired, for which there is no related allowance for credit losses.

+ References

No definition available.

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