Loans and Allowance for Credit Losses - Loan Portfolio by Categories (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 16,142,124	$ 12,012,503
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	349,810	355,370
Consumer | Credit cards
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	196,928	187,052
Consumer | Other consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	152,882	168,318
Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	12,581,262	9,167,250
Real Estate | Construction and development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	2,566,649	1,326,371
Real Estate | Single family residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	2,546,115	2,101,975
Real Estate | Other commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	7,468,498	5,738,904
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	2,837,913	2,160,760
Commercial | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	2,632,290	1,992,043
Commercial | Agricultural
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	205,623	168,717
Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 373,139	$ 329,123