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 |
Jun. 30, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Standby Letters of Credit [Member] | ||
| Commitments And Contingencies [Line Items] | ||
| Loans commitments, Fixed Rate | $ 9,797 | $ 11,637 |
| Loans commitments, Variable Rate | 32,073 | 31,719 |
| Commitments to Make Loans [Member] | ||
| Commitments And Contingencies [Line Items] | ||
| Loans commitments, Fixed Rate | 114,177 | 64,972 |
| Loans commitments, Variable Rate | 450,774 | 406,614 |
| Mortgage Loans in the Process of Origination [Member] | ||
| Commitments And Contingencies [Line Items] | ||
| Loans commitments, Fixed Rate | 8,643 | 3,152 |
| Loans commitments, Variable Rate | 2,747 | 117 |
| Unused Lines of Credit [Member] | ||
| Commitments And Contingencies [Line Items] | ||
| Loans commitments, Fixed Rate | 220,896 | 195,483 |
| Loans commitments, Variable Rate | $ 734,216 | $ 538,731 |