Loans and Allowance for Credit Losses - Loan Portfolio by Categories (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 17,005,937	$ 16,845,670
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	308,994	318,666
Consumer | Credit cards
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	181,675	191,204
Consumer | Other consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	127,319	127,462
Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	13,391,531	13,338,186
Real Estate | Construction and development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	2,789,249	3,144,220
Real Estate | Single family residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	2,689,946	2,641,556
Real Estate | Other commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	7,912,336	7,552,410
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	2,695,329	2,722,886
Commercial | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	2,434,175	2,490,176
Commercial | Agricultural
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	261,154	232,710
Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 610,083	$ 465,932