Commitments and Credit Risk - Summary of Contractual Amounts of Commitments and Standby Letters of Credit to Originate Loans and Available Lines of Credit (Detail) - USD ($) $ in Thousands |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Standby Letters of Credit [Member] | ||
| Commitments And Contingencies [Line Items] | ||
| Loans commitments, Fixed Rate | $ 11,637 | $ 15,081 |
| Loans commitments, Variable Rate | 31,719 | 27,715 |
| Commitments to Make Loans [Member] | ||
| Commitments And Contingencies [Line Items] | ||
| Loans commitments, Fixed Rate | 64,972 | 28,758 |
| Loans commitments, Variable Rate | 406,614 | 389,370 |
| Mortgage Loans in the Process of Origination [Member] | ||
| Commitments And Contingencies [Line Items] | ||
| Loans commitments, Fixed Rate | 3,152 | 1,345 |
| Loans commitments, Variable Rate | 117 | 2,252 |
| Unused Lines of Credit [Member] | ||
| Commitments And Contingencies [Line Items] | ||
| Loans commitments, Fixed Rate | 195,483 | 162,753 |
| Loans commitments, Variable Rate | $ 538,731 | $ 377,091 |