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Loans and Allowance for Credit Losses - Nonaccrual Loans, Excluding Loans Acquired, Segregated by Class of Loans (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans in nonaccrual status | $ 68,204 | $ 122,879
Consumer |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans in nonaccrual status | 758 | 1,520
Consumer | Credit cards |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans in nonaccrual status | 377 | 301
Consumer | Other consumer |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans in nonaccrual status | 381 | 1,219
Real Estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans in nonaccrual status | 48,517 | 55,842
Real Estate | Construction and development |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans in nonaccrual status | 2,296 | 3,625
Real Estate | Single family residential |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans in nonaccrual status | 19,268 | 28,062
Real Estate | Other commercial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans in nonaccrual status | 26,953 | 24,155
Commercial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans in nonaccrual status | 18,926 | 65,517
Commercial | Commercial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans in nonaccrual status | 18,774 | 65,244
Commercial | Agricultural |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans in nonaccrual status | 152 | 273
Other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans in nonaccrual status | $ 3 | $ 0

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