Loans and Allowance for Credit Losses - Nonaccrual Loans, Excluding Loans Acquired, Segregated by Class of Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Financing Receivable, Past Due [Line Items]
Loans in nonaccrual status	$ 81,135	$ 58,434
Consumer
Financing Receivable, Past Due [Line Items]
Loans in nonaccrual status	925	782
Consumer | Credit cards
Financing Receivable, Past Due [Line Items]
Loans in nonaccrual status	267	349
Consumer | Other consumer
Financing Receivable, Past Due [Line Items]
Loans in nonaccrual status	658	433
Real Estate
Financing Receivable, Past Due [Line Items]
Loans in nonaccrual status	38,475	40,116
Real Estate | Construction and development
Financing Receivable, Past Due [Line Items]
Loans in nonaccrual status	2,964	2,799
Real Estate | Single family residential
Financing Receivable, Past Due [Line Items]
Loans in nonaccrual status	23,662	22,319
Real Estate | Other commercial
Financing Receivable, Past Due [Line Items]
Loans in nonaccrual status	11,849	14,998
Commercial
Financing Receivable, Past Due [Line Items]
Loans in nonaccrual status	41,732	17,533
Commercial | Commercial
Financing Receivable, Past Due [Line Items]
Loans in nonaccrual status	41,008	17,356
Commercial | Agricultural
Financing Receivable, Past Due [Line Items]
Loans in nonaccrual status	724	177
Other
Financing Receivable, Past Due [Line Items]
Loans in nonaccrual status	$ 3	$ 3