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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, 2024
Mar. 31, 2023
Financing Receivable Allowance For Credit Losses [Line Items]    
Allowance for credit losses on loans, beginning balance $ 332,362 $ 281,576
Charge-offs (3,601) (2,191)
Recoveries 1,458 2,806
Net (charge-offs) recoveries (2,143) 615
Allowance for credit losses on loans, ending balance 330,219 282,191
Agriculture [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Allowance for credit losses on loans, beginning balance 11,380 7,699
Provision for credit losses 1,270 356
Charge-offs (121)  
Recoveries   6
Net (charge-offs) recoveries   6
Allowance for credit losses on loans, ending balance 12,627 8,061
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 87,775 78,853
Provision for credit losses (5,619) 1,695
Recoveries 2 13
Net (charge-offs) recoveries 2 13
Allowance for credit losses on loans, ending balance 82,158 80,561
Real Estate [Member] | Agriculture [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Recoveries 98  
Net (charge-offs) recoveries (23)  
Real Estate [Member] | 1-4 Family [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Allowance for credit losses on loans, beginning balance 77,652 60,795
Provision for credit losses 2,469 1,603
Charge-offs (461) (65)
Recoveries 4 205
Net (charge-offs) recoveries (457) 140
Allowance for credit losses on loans, ending balance 79,664 62,538
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 88,664 66,272
Provision for credit losses (1,468) 1,699
Charge-offs 0 0
Recoveries   1
Net (charge-offs) recoveries 17 1
Allowance for credit losses on loans, ending balance 87,213 67,972
Commercial and Industrial [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Allowance for credit losses on loans, beginning balance 59,832 62,319
Provision for credit losses 2,067 (6,495)
Charge-offs (1,360) (901)
Recoveries 1,077 2,373
Net (charge-offs) recoveries (283) 1,472
Allowance for credit losses on loans, ending balance 61,616 57,296
Consumer and Other [Member]    
Financing Receivable Allowance For Credit Losses [Line Items]    
Allowance for credit losses on loans, beginning balance 7,059 5,638
Provision for credit losses 1,281 1,142
Charge-offs (1,659) (1,225)
Recoveries 260 208
Net (charge-offs) recoveries (1,399) (1,017)
Allowance for credit losses on loans, ending balance $ 6,941 $ 5,763