Business Segment Reporting - Additional Information (Detail) |
6 Months Ended |
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Jun. 30, 2026
Segment
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| Segment Reporting [Abstract] | |
| Number of reportable segments | 3 |
| Segment Reporting, CODM, Individual Title and Position or Group Name [Extensible Enumeration] | srt:ChiefExecutiveOfficerMember, srt:ChiefFinancialOfficerMember, Bank's Chief Executive Officer Member, Chief Administrative Officer Member |
| Segment Reporting, CODM, Profit (Loss) Measure, How Used, Description | The CODM uses the Business Segment net income in deciding how to allocate resources and assess performance for individual Business Segments, including evaluating the cost or opportunity value of funds within each Business Segment and identifying areas of focus for organic growth or acquisition. |