v3.26.1
Segment Information - Summary Of Community Banking Segment Information (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Mar. 31, 2026
Jun. 30, 2025
Mar. 31, 2025
Jun. 30, 2026
Jun. 30, 2025
Segment Reporting [Line Items]            
Net interest income $ 285,312   $ 274,537   $ 567,827 $ 534,592
Provision for credit losses 4,961   5,889   12,737 34,992
Other income 38,506   31,460   72,569 61,014
Employee compensation 66,549   62,929   130,042 123,795
Employee benefits 16,296   13,434   32,276 26,725
Net occupancy expense 13,108   12,525   26,121 25,126
OREO expense 516   236   991 258
Net losses on the sales of OREO properties (37)   (16)   (37) (5)
Equipment Expense 9,435   8,551   18,175 17,133
Data processing expense 7,148   7,952   14,149 16,407
Bankcard Processing Expense 631   588   1,254 1,188
FDIC insurance expense 4,550   4,532   9,026 9,260
Income before income taxes 164,142   152,088   320,130 259,021
Income taxes 32,765   31,367   64,553 53,994
Net Income (Loss) 131,377 $ 124,200 120,721 $ 84,306 255,577 205,027
Operating Segments [Member] | Community Banking [Member]            
Segment Reporting [Line Items]            
Net interest income 285,312   274,537   567,827 534,592
Provision for credit losses 4,961   5,889   12,737 34,992
Other income 38,506   31,460   72,569 61,014
Employee compensation 66,549   62,929   130,042 123,795
Employee benefits 16,296   13,434   32,276 26,725
Net occupancy expense 13,108   12,525   26,121 25,126
OREO expense 516   236   991 258
Net losses on the sales of OREO properties 37   16   37 5
Equipment Expense 9,435   8,551   18,175 17,133
Data processing expense 7,148   7,952   14,149 16,407
Bankcard Processing Expense 631   588   1,254 1,188
FDIC insurance expense 4,550   4,532   9,026 9,260
Other segment expense [1] 36,445   37,257   75,458 81,696
Total other expense 154,715   148,020   307,529 301,593
Income before income taxes 164,142   152,088   320,130 259,021
Income taxes 32,765   31,367   64,553 53,994
Segment net income 131,377   120,721   255,577 205,027
Adjustments and reconciling items 0   0   0 0
Net Income (Loss) $ 131,377   $ 120,721   $ 255,577 $ 205,027
[1] Other segment expense includes legal, consulting and other professional services expense, franchise and other taxes not on income, expense for reserve on lending-related commitments, ATM expenses, marketing expense, core deposits amortization, and other general operating expenses.