v3.26.1
LHFI and ACL, LHFI - Change in Allowance for Loan Losses (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Balance at beginning of period $ 160,431 $ 167,010 $ 157,071 $ 160,270
Loans charged-off (3,493) (6,380) (7,179) (10,081)
Loans charged-off (9,809) (6,380) (13,495) (10,081)
Recoveries 2,342 2,261 4,700 4,577
Net (charge-offs) recoveries (7,467) (4,119) (8,795) (5,504)
PCL, LHFI (4,775) 5,346 (87) 13,471
Balance at end of period 148,189 168,237 148,189 168,237
Loans Held for Investment [Member]        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
PCL, LHFI 4,452 5,346 9,140 13,471
1-4 Family Mortgage Loans [Member]        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Loans charged-off (6,316) 0 (6,316) 0
PCL, LHFI (9,227) (0) (9,227) 0
Commercial and Industrial Loans [Member]        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Balance at beginning of period 24,800 25,396 20,569 27,020
Loans charged-off (703) (1,549) (1,614) (2,430)
Recoveries 242 264 590 499
PCL, LHFI 6,761 4,354 11,555 3,376
Balance at end of period 31,100 28,465 31,100 28,465
Consumer Loans [Member]        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Balance at beginning of period 6,137 5,238 5,843 5,141
Loans charged-off (2,494) (2,121) (4,330) (4,325)
Recoveries 1,530 1,458 3,331 3,046
PCL, LHFI 1,177 536 1,506 1,249
Balance at end of period 6,350 5,111 6,350 5,111
State and Other Political Subdivision Loans [Member]        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Balance at beginning of period 773 1,605 865 1,250
Loans charged-off 0 0 0 0
Recoveries 0 0 0 0
PCL, LHFI (62) (58) (154) 297
Balance at end of period 711 1,547 711 1,547
Other Commercial Loans and Leases [Member]        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Balance at beginning of period 9,063 6,530 8,009 6,247
Loans charged-off 0 (16) (15) (84)
Recoveries 104 61 115 93
PCL, LHFI 674 876 1,732 1,195
Balance at end of period 9,841 7,451 9,841 7,451
Loans Secured by Real Estate [Member] | Construction, Land Development and Other Land [Member]        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Balance at beginning of period 7,257 6,982 6,632 6,452
Loans charged-off 0 0 0 0
Recoveries 30 194 60 196
PCL, LHFI 761 173 1,356 701
Balance at end of period 8,048 7,349 8,048 7,349
Loans Secured by Real Estate [Member] | Other Secured by 1-4 Family Residential Properties [Member]        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Balance at beginning of period 14,477 12,476 13,584 11,347
Loans charged-off (140) (139) (746) (307)
Recoveries 72 123 169 222
PCL, LHFI 353 205 1,755 1,403
Balance at end of period 14,762 12,665 14,762 12,665
Loans Secured by Real Estate [Member] | Secured by Nonfarm, Nonresidential Properties [Member]        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Balance at beginning of period 31,093 39,973 35,183 37,896
Loans charged-off 0 (2,005) 0 (2,005)
Recoveries 291 0 317 0
PCL, LHFI (935) (2,951) (5,051) (874)
Balance at end of period 30,449 35,017 30,449 35,017
Loans Secured by Real Estate [Member] | Other Real Estate Secured [Member]        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Balance at beginning of period 18,187 23,348 20,410 19,491
Loans charged-off 0 0 0 0
Recoveries 1 0 1 77
PCL, LHFI (5,649) 157 (7,872) 3,937
Balance at end of period 12,539 23,505 12,539 23,505
Other Loans Secured by Real Estate [Member] | Secured by 1-4 Family Residential Properties [Member]        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Balance at beginning of period 43,949 35,602 41,087 32,129
Loans charged-off (6,472) (550) (6,790) (930)
Recoveries 68 160 113 441
PCL, LHFI (8,307) 3,773 (5,172) 7,345
Balance at end of period 29,238 38,985 29,238 38,985
Other Loans Secured by Real Estate [Member] | Other Construction [Member]        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Balance at beginning of period 4,695 9,860 4,889 13,297
Loans charged-off 0 0 0 0
Recoveries 4 1 4 3
PCL, LHFI 452 (1,719) 258 (5,158)
Balance at end of period $ 5,151 $ 8,142 $ 5,151 $ 8,142