v3.26.1
Segment Information - Summary of Community Banking Segment Total Assets (Detail) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Jun. 30, 2025
Segment Reporting [Line Items]      
Total Assets $ 33,751,832 $ 33,660,281  
Operating Segments [Member] | Community Banking [Member]      
Segment Reporting [Line Items]      
Total Assets $ 33,751,832   $ 32,783,363