Loans and Allowance for Credit Losses - Nonaccrual Loans, Excluding Loans Acquired, Segregated by Class of Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Financing Receivable, Past Due [Line Items]
Loans in nonaccrual status	$ 57,534	$ 68,204
Consumer
Financing Receivable, Past Due [Line Items]
Loans in nonaccrual status	611	758
Consumer | Credit cards
Financing Receivable, Past Due [Line Items]
Loans in nonaccrual status	305	377
Consumer | Other consumer
Financing Receivable, Past Due [Line Items]
Loans in nonaccrual status	306	381
Real Estate
Financing Receivable, Past Due [Line Items]
Loans in nonaccrual status	41,428	48,517
Real Estate | Construction and development
Financing Receivable, Past Due [Line Items]
Loans in nonaccrual status	3,285	2,296
Real Estate | Single family residential
Financing Receivable, Past Due [Line Items]
Loans in nonaccrual status	22,761	19,268
Real Estate | Other commercial
Financing Receivable, Past Due [Line Items]
Loans in nonaccrual status	15,382	26,953
Commercial
Financing Receivable, Past Due [Line Items]
Loans in nonaccrual status	15,485	18,926
Commercial | Commercial
Financing Receivable, Past Due [Line Items]
Loans in nonaccrual status	15,411	18,774
Commercial | Agricultural
Financing Receivable, Past Due [Line Items]
Loans in nonaccrual status	74	152
Other
Financing Receivable, Past Due [Line Items]
Loans in nonaccrual status	$ 10	$ 3