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 |
Mar. 31, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Standby Letters of Credit [Member] | ||
| Commitments And Contingencies [Line Items] | ||
| Loans commitments, Fixed Rate | $ 12,005 | $ 11,637 |
| Loans commitments, Variable Rate | 31,401 | 31,719 |
| Commitments to Make Loans [Member] | ||
| Commitments And Contingencies [Line Items] | ||
| Loans commitments, Fixed Rate | 98,672 | 64,972 |
| Loans commitments, Variable Rate | 474,060 | 406,614 |
| Mortgage Loans in the Process of Origination [Member] | ||
| Commitments And Contingencies [Line Items] | ||
| Loans commitments, Fixed Rate | 7,629 | 3,152 |
| Loans commitments, Variable Rate | 257 | 117 |
| Unused Lines of Credit [Member] | ||
| Commitments And Contingencies [Line Items] | ||
| Loans commitments, Fixed Rate | 200,138 | 195,483 |
| Loans commitments, Variable Rate | $ 664,498 | $ 538,731 |