v3.26.1
Segment Information - Schedule of Segment Information (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Segment Reporting Information [Line Items]      
Interest income $ 927,560 $ 886,965  
Interest expense 348,536 360,491  
Net interest income 579,024 526,474  
Provision for credit losses 29,594 23,963  
Non-interest income 134,142 116,634  
Salaries 129,086 123,917  
Commissions and incentive compensation 57,407 52,536  
Benefits 41,954 35,073  
Other segment expenses 154,185 154,564  
Total non-interest expense 382,632 366,090  
Income before taxes 300,940 253,055  
Income tax expense 73,552 64,016  
Net income 227,388 189,039  
Total assets at period end 72,157,433 65,870,066 $ 71,142,046
Operating Segments      
Segment Reporting Information [Line Items]      
Interest income 916,560 876,197  
Interest expense 348,536 360,491  
Net interest income 568,024 515,706  
Provision for credit losses 29,594 23,963  
Non-interest income 156,890 138,322  
Salaries 128,572 123,452  
Commissions and incentive compensation 57,407 52,536  
Benefits 41,954 35,073  
Other segment expenses 166,447 165,949  
Total non-interest expense 394,380 377,010  
Income before taxes 300,940 253,055  
Income tax expense 73,552 64,016  
Net income 227,388 189,039  
Total assets at period end 72,157,433 65,870,066  
Operating Segments | Community Banking      
Segment Reporting Information [Line Items]      
Interest income 781,502 768,968  
Interest expense 330,904 349,957  
Net interest income 450,598 419,011  
Provision for credit losses 27,281 22,428  
Non-interest income 77,882 73,493  
Salaries 101,576 98,586  
Commissions and incentive compensation 33,128 32,137  
Benefits 32,243 27,374  
Other segment expenses 132,607 132,490  
Total non-interest expense 299,554 290,587  
Income before taxes 201,645 179,489  
Income tax expense 51,114 45,219  
Net income 150,531 134,270  
Total assets at period end 57,233,526 53,531,046  
Operating Segments | Specialty Finance      
Segment Reporting Information [Line Items]      
Interest income 124,576 101,698  
Interest expense 17,493 10,391  
Net interest income 107,083 91,307  
Provision for credit losses 2,313 1,535  
Non-interest income 35,733 31,039  
Salaries 18,023 15,762  
Commissions and incentive compensation 9,862 9,041  
Benefits 6,640 4,718  
Other segment expenses 24,682 23,445  
Total non-interest expense 59,207 52,966  
Income before taxes 81,296 67,845  
Income tax expense 18,203 17,552  
Net income 63,093 50,293  
Total assets at period end 13,533,665 11,312,205  
Operating Segments | Wealth Management      
Segment Reporting Information [Line Items]      
Interest income 10,482 5,531  
Interest expense 139 143  
Net interest income 10,343 5,388  
Provision for credit losses 0 0  
Non-interest income 43,275 33,790  
Salaries 8,973 9,104  
Commissions and incentive compensation 14,417 11,358  
Benefits 3,071 2,981  
Other segment expenses 9,158 10,014  
Total non-interest expense 35,619 33,457  
Income before taxes 17,999 5,721  
Income tax expense 4,235 1,245  
Net income 13,764 4,476  
Total assets at period end 1,390,242 1,026,815  
Intersegment Eliminations      
Segment Reporting Information [Line Items]      
Interest income 11,000 10,768  
Interest expense 0 0  
Net interest income 11,000 10,768  
Provision for credit losses 0 0  
Non-interest income (22,748) (21,688)  
Salaries 514 465  
Commissions and incentive compensation 0 0  
Benefits 0 0  
Other segment expenses (12,262) (11,385)  
Total non-interest expense (11,748) (10,920)  
Income before taxes 0 0  
Income tax expense 0 0  
Net income 0 0  
Total assets at period end $ 0 $ 0