v3.26.3
LOANS AND ALLOWANCE FOR CREDIT LOSSES - Summary of Past Due Aging of Loan Portfolio by Loan Class (Details) - USD ($)
$ in Thousands
Sep. 30, 2026
Dec. 31, 2025
Financing Receivable, Past Due [Line Items]    
Loans $ 15,600,974 $ 13,791,707
Loans > 90 Days or More Past Due and Accruing 12,672 2,042
Current    
Financing Receivable, Past Due [Line Items]    
Loans 15,459,401 13,660,833
30-59 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Loans 42,159 53,731
60-89 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Loans 20,754 15,567
90 Days or More Past Due    
Financing Receivable, Past Due [Line Items]    
Loans 78,660 61,576
Commercial and industrial loans    
Financing Receivable, Past Due [Line Items]    
Loans 4,578,572 4,478,282
Loans > 90 Days or More Past Due and Accruing 8,026 313
Commercial and industrial loans | Current    
Financing Receivable, Past Due [Line Items]    
Loans 4,551,783 4,459,842
Commercial and industrial loans | 30-59 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Loans 6,603 7,194
Commercial and industrial loans | 60-89 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Loans 3,545 1,160
Commercial and industrial loans | 90 Days or More Past Due    
Financing Receivable, Past Due [Line Items]    
Loans 16,641 10,086
Agricultural land, production and other loans to farmers    
Financing Receivable, Past Due [Line Items]    
Loans 339,723 283,125
Loans > 90 Days or More Past Due and Accruing 0 0
Agricultural land, production and other loans to farmers | Current    
Financing Receivable, Past Due [Line Items]    
Loans 339,396 282,411
Agricultural land, production and other loans to farmers | 30-59 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Loans 239 480
Agricultural land, production and other loans to farmers | 60-89 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Loans 0 0
Agricultural land, production and other loans to farmers | 90 Days or More Past Due    
Financing Receivable, Past Due [Line Items]    
Loans 88 234
Construction    
Financing Receivable, Past Due [Line Items]    
Loans 959,483 804,775
Loans > 90 Days or More Past Due and Accruing 3,627 1,295
Construction | Current    
Financing Receivable, Past Due [Line Items]    
Loans 946,024 780,999
Construction | 30-59 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Loans 113 0
Construction | 60-89 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Loans 0 0
Construction | 90 Days or More Past Due    
Financing Receivable, Past Due [Line Items]    
Loans 13,346 23,776
Commercial real estate, non-owner occupied    
Financing Receivable, Past Due [Line Items]    
Loans 3,208,902 2,338,666
Loans > 90 Days or More Past Due and Accruing 683 0
Commercial real estate, non-owner occupied | Current    
Financing Receivable, Past Due [Line Items]    
Loans 3,190,142 2,318,624
Commercial real estate, non-owner occupied | 30-59 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Loans 8,831 19,125
Commercial real estate, non-owner occupied | 60-89 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Loans 0 345
Commercial real estate, non-owner occupied | 90 Days or More Past Due    
Financing Receivable, Past Due [Line Items]    
Loans 9,929 572
Commercial real estate, owner occupied    
Financing Receivable, Past Due [Line Items]    
Loans 1,440,264 1,237,100
Loans > 90 Days or More Past Due and Accruing 29 0
Commercial real estate, owner occupied | Current    
Financing Receivable, Past Due [Line Items]    
Loans 1,426,092 1,227,448
Commercial real estate, owner occupied | 30-59 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Loans 1,921 4,295
Commercial real estate, owner occupied | 60-89 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Loans 5,849 2,880
Commercial real estate, owner occupied | 90 Days or More Past Due    
Financing Receivable, Past Due [Line Items]    
Loans 6,402 2,477
Residential    
Financing Receivable, Past Due [Line Items]    
Loans 2,419,376 2,420,310
Loans > 90 Days or More Past Due and Accruing 209 434
Residential | Current    
Financing Receivable, Past Due [Line Items]    
Loans 2,370,269 2,372,637
Residential | 30-59 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Loans 14,505 17,182
Residential | 60-89 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Loans 7,687 9,536
Residential | 90 Days or More Past Due    
Financing Receivable, Past Due [Line Items]    
Loans 26,915 20,955
Home equity    
Financing Receivable, Past Due [Line Items]    
Loans 1,139,040 710,980
Loans > 90 Days or More Past Due and Accruing 0 0
Home equity | Current    
Financing Receivable, Past Due [Line Items]    
Loans 1,121,440 701,360
Home equity | 30-59 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Loans 8,920 4,717
Home equity | 60-89 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Loans 3,443 1,427
Home equity | 90 Days or More Past Due    
Financing Receivable, Past Due [Line Items]    
Loans 5,237 3,476
Individuals' loans for household and other personal expenditures    
Financing Receivable, Past Due [Line Items]    
Loans 157,939 155,436
Loans > 90 Days or More Past Due and Accruing 98 0
Individuals' loans for household and other personal expenditures | Current    
Financing Receivable, Past Due [Line Items]    
Loans 156,580 154,479
Individuals' loans for household and other personal expenditures | 30-59 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Loans 1,027 738
Individuals' loans for household and other personal expenditures | 60-89 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Loans 230 219
Individuals' loans for household and other personal expenditures | 90 Days or More Past Due    
Financing Receivable, Past Due [Line Items]    
Loans 102 0
Public finance and other commercial loans    
Financing Receivable, Past Due [Line Items]    
Loans 1,357,675 1,363,033
Loans > 90 Days or More Past Due and Accruing 0 0
Public finance and other commercial loans | Current    
Financing Receivable, Past Due [Line Items]    
Loans 1,357,675 1,363,033
Public finance and other commercial loans | 30-59 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Loans 0 0
Public finance and other commercial loans | 60-89 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Loans 0 0
Public finance and other commercial loans | 90 Days or More Past Due    
Financing Receivable, Past Due [Line Items]    
Loans $ 0 $ 0