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Allowance for Credit Losses - Credit quality indicator write-offs (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Allowance for Credit Losses
Total	$ 30	$ 48	$ 87	$ 101
Internally Rated
Allowance for Credit Losses
Year 1			82	85
Year 2			3	5
Year 3			0	9
Year 4			0	0
Year 5			0	1
Prior			2	1
Revolving Loans			0	0
Revolving Loans Converted to Term Loans			0	0
Total			87	101
Real estate, residential
Allowance for Credit Losses
Total	1	1	2	1
Commercial and industrial
Allowance for Credit Losses
Total	0	0	0	0
Consumer/Other \| A, B, or C
Allowance for Credit Losses
Year 1			82	85
Year 2			3	1
Year 3			0	9
Year 4			0	0
Year 5			0	1
Prior			0	0
Revolving Loans			0	0
Revolving Loans Converted to Term Loans			0	0
Total			85	96
Consumer/Other \| S
Allowance for Credit Losses
Year 1			0	0
Year 2			0	0
Year 3			0	0
Year 4			0	0
Year 5			0	0
Prior			0	0
Revolving Loans			0	0
Revolving Loans Converted to Term Loans			0	0
Total			0	0
Consumer/Other \| D
Allowance for Credit Losses
Year 1			0	0
Year 2			0	1
Year 3			0	0
Year 4			0	0
Year 5			0	0
Prior			0	0
Revolving Loans			0	0
Revolving Loans Converted to Term Loans			0	0
Total			0	1
Consumer/Other \| E
Allowance for Credit Losses
Year 1			0	0
Year 2			0	3
Year 3			0	0
Year 4			0	0
Year 5			0	0
Prior			0	0
Revolving Loans			0	0
Revolving Loans Converted to Term Loans			0	0
Total			0	3
Consumer/Other \| F
Allowance for Credit Losses
Year 1			0	0
Year 2			0	0
Year 3			0	0
Year 4			0	0
Year 5			0	0
Prior			0	0
Revolving Loans			0	0
Revolving Loans Converted to Term Loans			0	0
Total			0	0
Consumer/Other \| Internally Rated
Allowance for Credit Losses
Year 1			82	85
Year 2			3	5
Year 3			0	9
Year 4			0	0
Year 5			0	1
Prior			0	0
Revolving Loans			0	0
Revolving Loans Converted to Term Loans			0	0
Total			85	100
Real estate, nonresidential
Allowance for Credit Losses
Year 1			0
Year 2			0
Year 3			0
Year 4			0
Year 5			0
Prior			0
Revolving Loans			0
Revolving Loans Converted to Term Loans			0
Total	$ 0	$ 0	0	0
Real estate, nonresidential \| A, B, or C
Allowance for Credit Losses
Year 1			0
Year 2			0
Year 3			0
Year 4			0
Year 5			0
Prior			0
Revolving Loans			0
Revolving Loans Converted to Term Loans			0
Total			0
Real estate, nonresidential \| S
Allowance for Credit Losses
Year 1			0
Year 2			0
Year 3			0
Year 4			0
Year 5			0
Prior			0
Revolving Loans			0
Revolving Loans Converted to Term Loans			0
Total			0
Real estate, nonresidential \| D
Allowance for Credit Losses
Year 1			0
Year 2			0
Year 3			0
Year 4			0
Year 5			0
Prior			0
Revolving Loans			0
Revolving Loans Converted to Term Loans			0
Total			0
Real estate, nonresidential \| E
Allowance for Credit Losses
Year 1			0
Year 2			0
Year 3			0
Year 4			0
Year 5			0
Prior			2	1
Revolving Loans			0
Revolving Loans Converted to Term Loans			0
Total			2	1
Real estate, nonresidential \| F
Allowance for Credit Losses
Year 1			0
Year 2			0
Year 3			0
Year 4			0
Year 5			0
Prior			0
Revolving Loans			0
Revolving Loans Converted to Term Loans			0
Total			0
Real estate, nonresidential \| Internally Rated
Allowance for Credit Losses
Year 1			0
Year 2			0
Year 3			0
Year 4			0
Year 5			0
Prior			2	1
Revolving Loans			0
Revolving Loans Converted to Term Loans			0
Total			$ 2	$ 1