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Loans and Allowance for Credit Losses - Loan Portfolio by Categories (Details) - USD ($) $ in Thousands | Jun. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Loans and Leases Receivable Disclosure [Line Items] |  |
Loans | $ 16,833,653 | $ 16,142,124
Consumer |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Loans | 357,785 | 349,810
Consumer | Credit cards |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Loans | 209,452 | 196,928
Consumer | Other consumer |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Loans | 148,333 | 152,882
Real Estate |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Loans | 13,110,081 | 12,581,262
Real Estate | Construction and development |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Loans | 2,930,586 | 2,566,649
Real Estate | Single family residential |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Loans | 2,633,365 | 2,546,115
Real Estate | Other commercial |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Loans | 7,546,130 | 7,468,498
Commercial |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Loans | 2,849,871 | 2,837,913
Commercial | Commercial |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Loans | 2,569,330 | 2,632,290
Commercial | Agricultural |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Loans | 280,541 | 205,623
Other |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Loans | $ 515,916 | $ 373,139

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