Credit Quality - Additional Information (Detail) - USD ($) $ in Thousands |
6 Months Ended | 12 Months Ended |
|---|---|---|
Jun. 30, 2026 |
Dec. 31, 2025 |
|
| Receivables [Abstract] | ||
| Minimum days for discontinue of accrual interest on commercial and consumer loan | 90 days | |
| Maximum days for discontinue of accrual interest on commercial and consumer loan | 120 days | |
| Minimum number of days required for special mention | 30 days | |
| Maximum number of days required for special mention | 89 days | |
| Number of days required for substandard | 90 days | |
| OREO | $ 10,212 | $ 8,857 |
| Recorded investment of consumer mortgage loans | $ 2,324 | 1,868 |
| Description of Credit Risk Exposure | For United’s loans with a corporate credit exposure, United analyzes loans individually to classify the loans as to credit risk. Review and analysis of criticized (special mention-rated loans in the amount of $1,000 or greater) and classified (substandard-rated and worse in the amount of $500 and greater) loans is completed once per quarter. Review of notes with committed exposure of $4,000 or greater is completed at least annually. | |
| Modification additional funds recorded investment | $ 9 | $ 139 |