v3.26.1
LHFI and ACL, LHFI - Change in Allowance for Loan Losses (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Financing Receivable, Allowance for Credit Losses [Roll Forward]    
Balance at beginning of period $ 157,071 $ 160,270
Loans charged-off (3,686) (3,701)
Loans charged-off (3,686) (3,701)
Recoveries 2,358 2,316
Net (charge-offs) recoveries (1,328) (1,385)
PCL, LHFI 4,688 8,125
Balance at end of period 160,431 167,010
Loans Held for Investment [Member]    
Financing Receivable, Allowance for Credit Losses [Roll Forward]    
PCL, LHFI 4,688 8,125
Commercial and Industrial Loans [Member]    
Financing Receivable, Allowance for Credit Losses [Roll Forward]    
Balance at beginning of period 20,569 27,020
Loans charged-off (911) (881)
Recoveries 348 235
PCL, LHFI 4,794 (978)
Balance at end of period 24,800 25,396
Consumer Loans [Member]    
Financing Receivable, Allowance for Credit Losses [Roll Forward]    
Balance at beginning of period 5,843 5,141
Loans charged-off (1,836) (2,204)
Recoveries 1,801 1,588
PCL, LHFI 329 713
Balance at end of period 6,137 5,238
State and Other Political Subdivision Loans [Member]    
Financing Receivable, Allowance for Credit Losses [Roll Forward]    
Balance at beginning of period 865 1,250
Loans charged-off 0 0
Recoveries 0 0
PCL, LHFI (92) 355
Balance at end of period 773 1,605
Other Commercial Loans and Leases [Member]    
Financing Receivable, Allowance for Credit Losses [Roll Forward]    
Balance at beginning of period 8,009 6,247
Loans charged-off (15) (68)
Recoveries 11 32
PCL, LHFI 1,058 319
Balance at end of period 9,063 6,530
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 6,632 6,452
Loans charged-off 0 0
Recoveries 30 2
PCL, LHFI 595 528
Balance at end of period 7,257 6,982
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 13,584 11,347
Loans charged-off (606) (168)
Recoveries 97 99
PCL, LHFI 1,402 1,198
Balance at end of period 14,477 12,476
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 35,183 37,896
Loans charged-off 0 0
Recoveries 26 0
PCL, LHFI (4,116) 2,077
Balance at end of period 31,093 39,973
Loans Secured by Real Estate [Member] | Other Real Estate Secured [Member]    
Financing Receivable, Allowance for Credit Losses [Roll Forward]    
Balance at beginning of period 20,410 19,491
Loans charged-off 0 0
Recoveries 0 77
PCL, LHFI (2,223) 3,780
Balance at end of period 18,187 23,348
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 41,087 32,129
Loans charged-off (318) (380)
Recoveries 45 281
PCL, LHFI 3,135 3,572
Balance at end of period 43,949 35,602
Other Loans Secured by Real Estate [Member] | Other Construction [Member]    
Financing Receivable, Allowance for Credit Losses [Roll Forward]    
Balance at beginning of period 4,889 13,297
Loans charged-off 0 0
Recoveries 0 2
PCL, LHFI (194) (3,439)
Balance at end of period $ 4,695 $ 9,860