Loans and Allowance for Credit Losses - Loan Portfolio by Categories (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 16,845,670	$ 16,142,124
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	318,666	349,810
Consumer | Credit cards
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	191,204	196,928
Consumer | Other consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	127,462	152,882
Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	13,338,186	12,581,262
Real Estate | Construction and development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	3,144,220	2,566,649
Real Estate | Single family residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	2,641,556	2,546,115
Real Estate | Other commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	7,552,410	7,468,498
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	2,722,886	2,837,913
Commercial | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	2,490,176	2,632,290
Commercial | Agricultural
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	232,710	205,623
Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 465,932	$ 373,139