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Loans and Allowance for Credit Losses - Allowance for Credit Losses on Loans by Category of Loan (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Financing Receivable Allowance For Credit Losses [Line Items]    
Allowance for credit losses on loans, beginning balance $ 351,805 $ 332,362
Charge-offs (3,943) (3,601)
Recoveries 1,239 1,458
Net (charge-offs) recoveries (2,704) (2,143)
Allowance for credit losses on loans, ending balance 349,101 330,219
Agriculture [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Allowance for credit losses on loans, beginning balance 27,693 11,380
Provision for credit losses (1,596) 1,270
Charge-offs   (121)
Recoveries   98
Net (charge-offs) recoveries   (23)
Allowance for credit losses on loans, ending balance 26,097 12,627
Real Estate [Member] | Construction, Land Development and Other Land Loans [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Allowance for credit losses on loans, beginning balance 77,984 87,775
Provision for credit losses 2,440 (5,619)
Recoveries 156 2
Net (charge-offs) recoveries 156 2
Allowance for credit losses on loans, ending balance 80,580 82,158
Real Estate [Member] | 1-4 Family [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Allowance for credit losses on loans, beginning balance 80,735 77,652
Provision for credit losses 4,211 2,469
Charge-offs (1,057) (461)
Recoveries 6 4
Net (charge-offs) recoveries (1,051) (457)
Allowance for credit losses on loans, ending balance 83,895 79,664
Real Estate [Member] | Commercial Real Estate (Includes Multi-Family Residential) [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Allowance for credit losses on loans, beginning balance 92,147 88,664
Provision for credit losses (1,662) (1,468)
Charge-offs (387)  
Recoveries 209 17
Net (charge-offs) recoveries (178) 17
Allowance for credit losses on loans, ending balance 90,307 87,213
Commercial and Industrial [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Allowance for credit losses on loans, beginning balance 65,500 59,832
Provision for credit losses (4,996) 2,067
Charge-offs (942) (1,360)
Recoveries 612 1,077
Net (charge-offs) recoveries (330) (283)
Allowance for credit losses on loans, ending balance 60,174 61,616
Consumer and Other [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Allowance for credit losses on loans, beginning balance 7,746 7,059
Provision for credit losses 1,603 1,281
Charge-offs (1,557) (1,659)
Recoveries 256 260
Net (charge-offs) recoveries (1,301) (1,399)
Allowance for credit losses on loans, ending balance $ 8,048 $ 6,941