Fair value estimates - Schedule of Assets and Liabilities Measured at Fair Value on Nonrecurring Basis (Details) - USD ($) $ in Thousands |
Mar. 31, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis | ||
| Other real estate owned | $ 1,682 | $ 1,682 |
| Nonrecurring Basis | ||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis | ||
| Loans individually evaluated for impairment, Recorded investments | 8,975 | 10,203 |
| Other real estate owned | 1,682 | 1,682 |
| Loans individually evaluated for impairment, Valuation allowance | 1,263 | 1,332 |
| Loans individually evaluated for credit loss | 7,712 | 8,871 |
| Other real estate owned | 1,682 | 1,682 |
| Nonrecurring Basis | Level 3 | ||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis | ||
| Loans individually evaluated for credit loss | 7,712 | 8,871 |
| Other real estate owned | $ 1,682 | $ 1,682 |