Loans - Balance of loans on nonaccrual status (Details) - USD ($) |
3 Months Ended | |
|---|---|---|
Mar. 31, 2026 |
Dec. 31, 2025 |
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||
| Interest income on loans on nonaccrual status | $ 13,000 | |
| Reversal of interest income upon placing commercial loans on nonaccrual status | 0 | |
| Loans on nonaccrual status | 2,012,000 | $ 2,157,000 |
| Commercial business | ||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||
| Loans on nonaccrual status | 2,000 | |
| Residential mortgage | ||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||
| Loans on nonaccrual status | 1,097,000 | 1,135,000 |
| Consumer finance | Automobiles | ||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||
| Loans on nonaccrual status | 890,000 | $ 1,022,000 |
| Consumer finance | Marine and recreational vehicles | ||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||
| Loans on nonaccrual status | $ 23,000 |