v3.26.1
LHFI and ACL, LHFI - Aging Analysis of Past Due and Nonaccrual LHFI by Loan Type (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Financing Receivable Allowance For Credit Losses [Line Items]    
Total LHFI $ 13,913,023 $ 13,674,233
Past Due 30 to 59 Days [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Total LHFI 23,162 33,490
Past Due 60 to 89 Days [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Total LHFI 18,108 10,671
Past Due 90 Days or More [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Total LHFI 36,871 45,313
Financial Asset, Past Due [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Total LHFI 78,141 89,474
Current Loans [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Total LHFI 13,834,882 13,584,759
Construction, Land Development and Other Land [Member] | Loans Secured by Real Estate [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Total LHFI 555,731 549,353
Construction, Land Development and Other Land [Member] | Loans Secured by Real Estate [Member] | Past Due 30 to 59 Days [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Total LHFI 2,023 786
Construction, Land Development and Other Land [Member] | Loans Secured by Real Estate [Member] | Past Due 60 to 89 Days [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Total LHFI 42 139
Construction, Land Development and Other Land [Member] | Loans Secured by Real Estate [Member] | Past Due 90 Days or More [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Total LHFI 200 0
Construction, Land Development and Other Land [Member] | Loans Secured by Real Estate [Member] | Financial Asset, Past Due [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Total LHFI 2,265 925
Construction, Land Development and Other Land [Member] | Loans Secured by Real Estate [Member] | Current Loans [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Total LHFI 553,466 548,428
Other Secured by 1-4 Family Residential Properties [Member] | Loans Secured by Real Estate [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Total LHFI 721,362 704,514
Other Secured by 1-4 Family Residential Properties [Member] | Loans Secured by Real Estate [Member] | Past Due 30 to 59 Days [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Total LHFI 4,953 6,118
Other Secured by 1-4 Family Residential Properties [Member] | Loans Secured by Real Estate [Member] | Past Due 60 to 89 Days [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Total LHFI 1,766 1,238
Other Secured by 1-4 Family Residential Properties [Member] | Loans Secured by Real Estate [Member] | Past Due 90 Days or More [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Total LHFI 4,178 3,868
Other Secured by 1-4 Family Residential Properties [Member] | Loans Secured by Real Estate [Member] | Financial Asset, Past Due [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Total LHFI 10,897 11,224
Other Secured by 1-4 Family Residential Properties [Member] | Loans Secured by Real Estate [Member] | Current Loans [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Total LHFI 710,465 693,290
Secured by 1-4 Family Residential Properties [Member] | Other Loans Secured by Real Estate [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Total LHFI 2,357,203 2,351,675
Secured by 1-4 Family Residential Properties [Member] | Other Loans Secured by Real Estate [Member] | Past Due 30 to 59 Days [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Total LHFI 11,097 19,838
Secured by 1-4 Family Residential Properties [Member] | Other Loans Secured by Real Estate [Member] | Past Due 60 to 89 Days [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Total LHFI 4,482 8,340
Secured by 1-4 Family Residential Properties [Member] | Other Loans Secured by Real Estate [Member] | Past Due 90 Days or More [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Total LHFI 4,624 34,838
Secured by 1-4 Family Residential Properties [Member] | Other Loans Secured by Real Estate [Member] | Financial Asset, Past Due [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Total LHFI 20,203 63,016
Secured by 1-4 Family Residential Properties [Member] | Other Loans Secured by Real Estate [Member] | Current Loans [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Total LHFI 2,337,000 2,288,659
Secured by Nonfarm, Nonresidential Properties [Member] | Loans Secured by Real Estate [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Total LHFI 3,198,800 3,304,523
Secured by Nonfarm, Nonresidential Properties [Member] | Loans Secured by Real Estate [Member] | Past Due 30 to 59 Days [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Total LHFI 901 1,798
Secured by Nonfarm, Nonresidential Properties [Member] | Loans Secured by Real Estate [Member] | Past Due 60 to 89 Days [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Total LHFI 8,254 185
Secured by Nonfarm, Nonresidential Properties [Member] | Loans Secured by Real Estate [Member] | Past Due 90 Days or More [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Total LHFI 8,556 3,829
Secured by Nonfarm, Nonresidential Properties [Member] | Loans Secured by Real Estate [Member] | Financial Asset, Past Due [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Total LHFI 17,711 5,812
Secured by Nonfarm, Nonresidential Properties [Member] | Loans Secured by Real Estate [Member] | Current Loans [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Total LHFI 3,181,089 3,298,711
Other Real Estate Secured [Member] | Loans Secured by Real Estate [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Total LHFI 1,990,550 2,124,272
Other Real Estate Secured [Member] | Loans Secured by Real Estate [Member] | Past Due 30 to 59 Days [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Total LHFI 36 1
Other Real Estate Secured [Member] | Loans Secured by Real Estate [Member] | Past Due 60 to 89 Days [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Total LHFI 0 0
Other Real Estate Secured [Member] | Loans Secured by Real Estate [Member] | Past Due 90 Days or More [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Total LHFI 234 316
Other Real Estate Secured [Member] | Loans Secured by Real Estate [Member] | Financial Asset, Past Due [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Total LHFI 270 317
Other Real Estate Secured [Member] | Loans Secured by Real Estate [Member] | Current Loans [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Total LHFI 1,990,280 2,123,955
Commercial and Industrial Loans [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Total LHFI 2,294,721 1,999,464
Commercial and Industrial Loans [Member] | Past Due 30 to 59 Days [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Total LHFI 2,492 2,828
Commercial and Industrial Loans [Member] | Past Due 60 to 89 Days [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Total LHFI 2,368 352
Commercial and Industrial Loans [Member] | Past Due 90 Days or More [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Total LHFI 18,155 1,014
Commercial and Industrial Loans [Member] | Financial Asset, Past Due [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Total LHFI 23,015 4,194
Commercial and Industrial Loans [Member] | Current Loans [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Total LHFI 2,271,706 1,995,270
Other Construction Financing Receivable [Member] | Other Loans Secured by Real Estate [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Total LHFI 661,069 595,238
Other Construction Financing Receivable [Member] | Other Loans Secured by Real Estate [Member] | Past Due 30 to 59 Days [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Total LHFI 0 0
Other Construction Financing Receivable [Member] | Other Loans Secured by Real Estate [Member] | Past Due 60 to 89 Days [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Total LHFI 0 0
Other Construction Financing Receivable [Member] | Other Loans Secured by Real Estate [Member] | Past Due 90 Days or More [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Total LHFI 0 0
Other Construction Financing Receivable [Member] | Other Loans Secured by Real Estate [Member] | Financial Asset, Past Due [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Total LHFI 0 0
Other Construction Financing Receivable [Member] | Other Loans Secured by Real Estate [Member] | Current Loans [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Total LHFI 661,069 595,238
Consumer Loans [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Total LHFI 160,648 163,754
Consumer Loans [Member] | Past Due 30 to 59 Days [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Total LHFI 1,658 2,109
Consumer Loans [Member] | Past Due 60 to 89 Days [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Total LHFI 430 402
Consumer Loans [Member] | Past Due 90 Days or More [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Total LHFI 504 453
Consumer Loans [Member] | Financial Asset, Past Due [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Total LHFI 2,592 2,964
Consumer Loans [Member] | Current Loans [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Total LHFI 158,056 160,790
State and Other Political Subdivision Loans [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Total LHFI 1,046,511 1,061,584
State and Other Political Subdivision Loans [Member] | Past Due 30 to 59 Days [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Total LHFI 0 8
State and Other Political Subdivision Loans [Member] | Past Due 60 to 89 Days [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Total LHFI 0 0
State and Other Political Subdivision Loans [Member] | Past Due 90 Days or More [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Total LHFI 0 995
State and Other Political Subdivision Loans [Member] | Financial Asset, Past Due [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Total LHFI 0 1,003
State and Other Political Subdivision Loans [Member] | Current Loans [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Total LHFI 1,046,511 1,060,581
Other Commercial Loans and Leases [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Total LHFI 926,428 819,856
Other Commercial Loans and Leases [Member] | Past Due 30 to 59 Days [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Total LHFI 2 4
Other Commercial Loans and Leases [Member] | Past Due 60 to 89 Days [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Total LHFI 766 15
Other Commercial Loans and Leases [Member] | Past Due 90 Days or More [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Total LHFI 420 0
Other Commercial Loans and Leases [Member] | Financial Asset, Past Due [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Total LHFI 1,188 19
Other Commercial Loans and Leases [Member] | Current Loans [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Total LHFI $ 925,240 $ 819,837