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Loans and Allowance for Credit Losses - Aging Analysis of Past Due Loans (Details) - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Accounts Notes And Loans Receivable [Line Items] |  |  |
Loans past due and still accruing |  | $ 21,954,942 | $ 21,002,310
Nonaccrual loans |  | 73,647 | 68,688
Total loans |  | 22,149,209 | 21,180,538
Financing Receivables, 30 to 89 Days Past Due [Member] |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Loans past due and still accruing |  | 118,431 | 107,345
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Loans past due and still accruing |  | 2,189 | 2,195
Financing Receivables Past Due Loans [Member] |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Loans past due and still accruing |  | 120,620 | 109,540
Warehouse Purchase Program Loans [Member] |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Loans past due and still accruing |  | 1,080,903 | 822,245
Total loans |  | 1,080,903 | 822,245
Agriculture [Member] |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Loans past due and still accruing |  | 1,025,783 | 806,011
Nonaccrual loans |  | 2,634 | 1,460
Total loans |  | 1,033,546 | 816,043
Agriculture [Member] | Financing Receivables, 30 to 89 Days Past Due [Member] |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Loans past due and still accruing |  | 4,554 | 8,572
Agriculture [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Loans past due and still accruing |  | 575 |
Agriculture [Member] | Financing Receivables Past Due Loans [Member] |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Loans past due and still accruing |  | 5,129 | 8,572
Real Estate [Member] | Construction, Land Development and Other Land Loans [Member] |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Loans past due and still accruing |  | 2,835,471 | 3,038,559
Nonaccrual loans |  | 2,079 | 14,770
Total loans |  | 2,859,281 | 3,076,591
Real Estate [Member] | Construction, Land Development and Other Land Loans [Member] | Financing Receivables, 30 to 89 Days Past Due [Member] |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Loans past due and still accruing |  | 21,464 | 21,627
Real Estate [Member] | Construction, Land Development and Other Land Loans [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Loans past due and still accruing |  | 267 | 1,635
Real Estate [Member] | Construction, Land Development and Other Land Loans [Member] | Financing Receivables Past Due Loans [Member] |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Loans past due and still accruing |  | 21,731 | 23,262
Real Estate [Member] | Agriculture [Member] |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Total loans |  | 1,033,546 |
Real Estate [Member] | 1-4 Family Residential (Includes Home Equity) [Member] |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Loans past due and still accruing | [1] | 8,396,150 | 8,103,904
Nonaccrual loans | [1] | 42,048 | 25,694
Total loans | [1] | 8,487,589 | 8,168,078
Real Estate [Member] | 1-4 Family Residential (Includes Home Equity) [Member] | Financing Receivables, 30 to 89 Days Past Due [Member] |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Loans past due and still accruing | [1] | 49,391 | 38,350
Real Estate [Member] | 1-4 Family Residential (Includes Home Equity) [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Loans past due and still accruing | [1] | 0 | 130
Real Estate [Member] | 1-4 Family Residential (Includes Home Equity) [Member] | Financing Receivables Past Due Loans [Member] |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Loans past due and still accruing | [1] | 49,391 | 38,480
Real Estate [Member] | Commercial Real Estate (Includes Multi-Family Residential) [Member] |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Loans past due and still accruing |  | 5,766,838 | 5,620,775
Nonaccrual loans |  | 18,455 | 18,662
Total loans |  | 5,800,985 | 5,662,948
Real Estate [Member] | Commercial Real Estate (Includes Multi-Family Residential) [Member] | Financing Receivables, 30 to 89 Days Past Due [Member] |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Loans past due and still accruing |  | 15,692 | 23,511
Real Estate [Member] | Commercial Real Estate (Includes Multi-Family Residential) [Member] | Financing Receivables Past Due Loans [Member] |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Loans past due and still accruing |  | 15,692 | 23,511
Commercial and Industrial [Member] |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Loans past due and still accruing |  | 2,471,541 | 2,281,762
Nonaccrual loans |  | 8,348 | 8,066
Total loans |  | 2,508,088 | 2,305,040
Commercial and Industrial [Member] | Financing Receivables, 30 to 89 Days Past Due [Member] |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Loans past due and still accruing |  | 26,852 | 14,782
Commercial and Industrial [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Loans past due and still accruing |  | 1,347 | 430
Commercial and Industrial [Member] | Financing Receivables Past Due Loans [Member] |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Loans past due and still accruing |  | 28,199 | 15,212
Consumer and Other [Member] |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Loans past due and still accruing |  | 378,256 | 329,054
Nonaccrual loans |  | 83 | 36
Total loans |  | 378,817 | 329,593
Consumer and Other [Member] | Financing Receivables, 30 to 89 Days Past Due [Member] |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Loans past due and still accruing |  | 478 | 503
Consumer and Other [Member] | Financing Receivables Past Due Loans [Member] |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Loans past due and still accruing |  | $ 478 | $ 503
[1] | Includes $10.7 million and $5.7 million of residential mortgage loans held for sale at December 31, 2024 and 2023, respectively.

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- Definition Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements. + References No definition available. + Details
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