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Loans and Allowance for Credit Losses - Schedule of Contractual Maturities of Loans Classified by Major Type (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Accounts Notes And Loans Receivable [Line Items]
Loans, net	$ 21,092,851	$ 21,092,851
Loans with a predetermined interest rate	8,671,190
Loans with a variable interest rate	12,421,661
Agriculture [Member]
Accounts Notes And Loans Receivable [Line Items]
Loans, net	1,035,649
Commercial and Industrial [Member]
Accounts Notes And Loans Receivable [Line Items]
Loans, net	2,513,324
Real Estate [Member] | Construction, Land Development and Other Land Loans [Member]
Accounts Notes And Loans Receivable [Line Items]
Loans, net	2,860,629
Real Estate [Member] | 1-4 Family Residential (Includes Home Equity) [Member]
Accounts Notes And Loans Receivable [Line Items]
Loans, net	8,475,015
Real Estate [Member] | Commercial Real Estate (Includes Multi-Family Residential) [Member]
Accounts Notes And Loans Receivable [Line Items]
Loans, net	5,829,013
Consumer and Other [Member]
Accounts Notes And Loans Receivable [Line Items]
Loans, net	379,221
Financing Receivable, Maturity of One Year or Less [Member]
Accounts Notes And Loans Receivable [Line Items]
Loans, net	2,204,383	2,204,383
Loans with a predetermined interest rate	533,187
Loans with a variable interest rate	1,671,196
Financing Receivable, Maturity of One Year or Less [Member] | Agriculture [Member]
Accounts Notes And Loans Receivable [Line Items]
Loans, net	321,986
Financing Receivable, Maturity of One Year or Less [Member] | Commercial and Industrial [Member]
Accounts Notes And Loans Receivable [Line Items]
Loans, net	778,650
Financing Receivable, Maturity of One Year or Less [Member] | Real Estate [Member] | Construction, Land Development and Other Land Loans [Member]
Accounts Notes And Loans Receivable [Line Items]
Loans, net	693,907
Financing Receivable, Maturity of One Year or Less [Member] | Real Estate [Member] | 1-4 Family Residential (Includes Home Equity) [Member]
Accounts Notes And Loans Receivable [Line Items]
Loans, net	53,794
Financing Receivable, Maturity of One Year or Less [Member] | Real Estate [Member] | Commercial Real Estate (Includes Multi-Family Residential) [Member]
Accounts Notes And Loans Receivable [Line Items]
Loans, net	271,543
Financing Receivable, Maturity of One Year or Less [Member] | Consumer and Other [Member]
Accounts Notes And Loans Receivable [Line Items]
Loans, net	84,503
Financing Receivable, Maturity After One Year Through Five Years [Member]
Accounts Notes And Loans Receivable [Line Items]
Loans, net	3,485,317	3,485,317
Loans with a predetermined interest rate	1,555,466
Loans with a variable interest rate	1,929,851
Financing Receivable, Maturity After One Year Through Five Years [Member] | Agriculture [Member]
Accounts Notes And Loans Receivable [Line Items]
Loans, net	164,851
Financing Receivable, Maturity After One Year Through Five Years [Member] | Commercial and Industrial [Member]
Accounts Notes And Loans Receivable [Line Items]
Loans, net	1,261,255
Financing Receivable, Maturity After One Year Through Five Years [Member] | Real Estate [Member] | Construction, Land Development and Other Land Loans [Member]
Accounts Notes And Loans Receivable [Line Items]
Loans, net	540,453
Financing Receivable, Maturity After One Year Through Five Years [Member] | Real Estate [Member] | 1-4 Family Residential (Includes Home Equity) [Member]
Accounts Notes And Loans Receivable [Line Items]
Loans, net	242,565
Financing Receivable, Maturity After One Year Through Five Years [Member] | Real Estate [Member] | Commercial Real Estate (Includes Multi-Family Residential) [Member]
Accounts Notes And Loans Receivable [Line Items]
Loans, net	1,199,783
Financing Receivable, Maturity After One Year Through Five Years [Member] | Consumer and Other [Member]
Accounts Notes And Loans Receivable [Line Items]
Loans, net	76,410
Financing Receivable, Maturity After Five Years Through Fifteen Years [Member]
Accounts Notes And Loans Receivable [Line Items]
Loans, net	5,351,818	5,351,818
Loans with a predetermined interest rate	3,111,854
Loans with a variable interest rate	2,239,964
Financing Receivable, Maturity After Five Years Through Fifteen Years [Member] | Agriculture [Member]
Accounts Notes And Loans Receivable [Line Items]
Loans, net	240,467
Financing Receivable, Maturity After Five Years Through Fifteen Years [Member] | Commercial and Industrial [Member]
Accounts Notes And Loans Receivable [Line Items]
Loans, net	362,261
Financing Receivable, Maturity After Five Years Through Fifteen Years [Member] | Real Estate [Member] | Construction, Land Development and Other Land Loans [Member]
Accounts Notes And Loans Receivable [Line Items]
Loans, net	573,702
Financing Receivable, Maturity After Five Years Through Fifteen Years [Member] | Real Estate [Member] | 1-4 Family Residential (Includes Home Equity) [Member]
Accounts Notes And Loans Receivable [Line Items]
Loans, net	1,888,707
Financing Receivable, Maturity After Five Years Through Fifteen Years [Member] | Real Estate [Member] | Commercial Real Estate (Includes Multi-Family Residential) [Member]
Accounts Notes And Loans Receivable [Line Items]
Loans, net	2,137,316
Financing Receivable, Maturity After Five Years Through Fifteen Years [Member] | Consumer and Other [Member]
Accounts Notes And Loans Receivable [Line Items]
Loans, net	149,365
Financing Receivable, Maturity After Fifteen Years [Member]
Accounts Notes And Loans Receivable [Line Items]
Loans, net	10,051,333	$ 10,051,333
Loans with a predetermined interest rate	3,470,683
Loans with a variable interest rate	6,580,650
Financing Receivable, Maturity After Fifteen Years [Member] | Agriculture [Member]
Accounts Notes And Loans Receivable [Line Items]
Loans, net	308,345
Financing Receivable, Maturity After Fifteen Years [Member] | Commercial and Industrial [Member]
Accounts Notes And Loans Receivable [Line Items]
Loans, net	111,158
Financing Receivable, Maturity After Fifteen Years [Member] | Real Estate [Member] | Construction, Land Development and Other Land Loans [Member]
Accounts Notes And Loans Receivable [Line Items]
Loans, net	1,052,567
Financing Receivable, Maturity After Fifteen Years [Member] | Real Estate [Member] | 1-4 Family Residential (Includes Home Equity) [Member]
Accounts Notes And Loans Receivable [Line Items]
Loans, net	6,289,949
Financing Receivable, Maturity After Fifteen Years [Member] | Real Estate [Member] | Commercial Real Estate (Includes Multi-Family Residential) [Member]
Accounts Notes And Loans Receivable [Line Items]
Loans, net	2,220,371
Financing Receivable, Maturity After Fifteen Years [Member] | Consumer and Other [Member]
Accounts Notes And Loans Receivable [Line Items]
Loans, net	$ 68,943

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-Topic 310
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-Name Accounting Standards Codification
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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 310
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