Loans and Allowance for Credit Losses - Nonaccrual Loans, Excluding Loans Acquired, Segregated by Class of Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Financing Receivable, Past Due [Line Items]
Loans in nonaccrual status	$ 63,218	$ 58,434
Consumer
Financing Receivable, Past Due [Line Items]
Loans in nonaccrual status	706	782
Consumer | Credit cards
Financing Receivable, Past Due [Line Items]
Loans in nonaccrual status	266	349
Consumer | Other consumer
Financing Receivable, Past Due [Line Items]
Loans in nonaccrual status	440	433
Real Estate
Financing Receivable, Past Due [Line Items]
Loans in nonaccrual status	40,738	40,116
Real Estate | Construction and development
Financing Receivable, Past Due [Line Items]
Loans in nonaccrual status	4,783	2,799
Real Estate | Single family residential
Financing Receivable, Past Due [Line Items]
Loans in nonaccrual status	23,509	22,319
Real Estate | Other commercial
Financing Receivable, Past Due [Line Items]
Loans in nonaccrual status	12,446	14,998
Commercial
Financing Receivable, Past Due [Line Items]
Loans in nonaccrual status	21,771	17,533
Commercial | Commercial
Financing Receivable, Past Due [Line Items]
Loans in nonaccrual status	21,628	17,356
Commercial | Agricultural
Financing Receivable, Past Due [Line Items]
Loans in nonaccrual status	143	177
Other
Financing Receivable, Past Due [Line Items]
Loans in nonaccrual status	$ 3	$ 3