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Loans and Allowance for Credit Losses - Recorded Investment and Unpaid Principal Balance for Impaired Loans with Associated Allowance (Detail) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2023 | Mar. 31, 2022 | Dec. 31, 2022
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | $ 31,345 |  | $ 34,319
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance | 44,654 |  | 45,247
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment | 30,168 | $ 37,509 |
Impaired Financing Receivable, with No Related Allowance, Interest Income, Cash Basis Method | 20 | 130 |
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 12,889 |  | 1,168
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance | 16,390 |  | 1,186
Related allowance | 9,762 |  | 711
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment | 8,980 | 800 |
Impaired Financing Receivable, with Related Allowance, Interest Income, Cash Basis Method | 0 | 6 |
Recorded investment | 44,234 |  | 35,487
Unpaid principal balance | 61,044 |  | 46,433
Impaired Financing Receivable, Average Recorded Investment | 39,148 | 38,309 |
Impaired Financing Receivable, Interest Income, Cash Basis Method | 20 | 136 |
Commercial, financial, agricultural and other [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 1,808 |  | 3,141
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance | 10,187 |  | 9,555
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment | 1,693 | 3,561 |
Impaired Financing Receivable, with No Related Allowance, Interest Income, Cash Basis Method | 0 | 29 |
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 10,556 |  | 1,168
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance | 13,881 |  | 1,186
Related allowance | 9,071 |  | 711
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment | 7,445 | 384 |
Impaired Financing Receivable, with Related Allowance, Interest Income, Cash Basis Method | 0 | 6 |
Construction |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 0 |  | 0
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance | 0 |  | 0
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 0 |  | 0
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance | 0 |  | 0
Related allowance | 0 |  | 0
Residential real estate [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 6,419 |  | 9,145
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance | 8,312 |  | 11,010
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment | 6,069 | 9,201 |
Impaired Financing Receivable, with No Related Allowance, Interest Income, Cash Basis Method | 20 | 84 |
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 1,237 |  | 0
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance | 1,406 |  | 0
Related allowance | 103 |  | 0
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment | 824 | 0 |
Impaired Financing Receivable, with Related Allowance, Interest Income, Cash Basis Method | 0 | 0 |
Commercial Real Estate [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 22,689 |  | 21,505
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance | 25,685 |  | 24,119
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment | 21,974 | 24,312 |
Impaired Financing Receivable, with No Related Allowance, Interest Income, Cash Basis Method | 0 | 13 |
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 1,096 |  | 0
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance | 1,103 |  | 0
Related allowance | 588 |  | 0
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment | 711 | 416 |
Impaired Financing Receivable, with Related Allowance, Interest Income, Cash Basis Method | 0 | 0 |
Loans to individuals [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 429 |  | 528
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance | 470 |  | 563
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment | 432 | 435 |
Impaired Financing Receivable, with No Related Allowance, Interest Income, Cash Basis Method | 0 | 4 |
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 0 |  | 0
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance | 0 |  | 0
Related allowance | 0 |  | 0
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment | 0 | 0 |
Impaired Financing Receivable, with Related Allowance, Interest Income, Cash Basis Method | 0 | 0 |
Real estate construction [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment | 0 | 0 |
Impaired Financing Receivable, with No Related Allowance, Interest Income, Cash Basis Method | 0 | 0 |
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment | 0 | 0 |
Impaired Financing Receivable, with Related Allowance, Interest Income, Cash Basis Method | 0 | 0 |
Time and Demand Loans | Commercial, financial, agricultural and other [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 1,607 |  | 3,141
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance | 9,978 |  | 9,555
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment | 1,455 | 3,561 |
Impaired Financing Receivable, with No Related Allowance, Interest Income, Cash Basis Method | 0 | 29 |
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 10,556 |  | 1,168
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance | 13,881 |  | 1,186
Related allowance | 9,071 |  | 711
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment | 7,445 | 384 |
Impaired Financing Receivable, with Related Allowance, Interest Income, Cash Basis Method | 0 | 6 |
Senior Lien | Residential real estate [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 3,543 |  | 5,754
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance | 4,633 |  | 6,848
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment | 3,437 | 5,197 |
Impaired Financing Receivable, with No Related Allowance, Interest Income, Cash Basis Method | 20 | 62 |
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 0 |  | 0
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance | 0 |  | 0
Related allowance | 0 |  | 0
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment | 0 | 0 |
Impaired Financing Receivable, with Related Allowance, Interest Income, Cash Basis Method | 0 | 0 |
Junior Lien | Residential real estate [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 2,876 |  | 3,391
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance | 3,679 |  | 4,162
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment | 2,632 | 4,004 |
Impaired Financing Receivable, with No Related Allowance, Interest Income, Cash Basis Method | 0 | 22 |
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 1,237 |  | 0
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance | 1,406 |  | 0
Related allowance | 103 |  | 0
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment | 824 | 0 |
Impaired Financing Receivable, with Related Allowance, Interest Income, Cash Basis Method | 0 | 0 |
Multifamily | Commercial Real Estate [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 0 |  | 0
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance | 0 |  | 0
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment | 0 | 0 |
Impaired Financing Receivable, with No Related Allowance, Interest Income, Cash Basis Method | 0 | 0 |
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 0 |  | 0
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance | 0 |  | 0
Related allowance | 0 |  | 0
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment | 0 | 416 |
Impaired Financing Receivable, with Related Allowance, Interest Income, Cash Basis Method | 0 | 0 |
Nonowner Occupied Commercial Real Estate | Commercial Real Estate [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 20,938 |  | 20,155
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance | 23,063 |  | 22,565
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment | 20,487 | 22,714 |
Impaired Financing Receivable, with No Related Allowance, Interest Income, Cash Basis Method | 0 | 9 |
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 173 |  | 0
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance | 212 |  | 0
Related allowance | 172 |  | 0
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment | 115 | 0 |
Impaired Financing Receivable, with Related Allowance, Interest Income, Cash Basis Method | 0 | 0 |
Owner Occupied Commercial Real Estate | Commercial Real Estate [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 1,751 |  | 1,350
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance | 2,622 |  | 1,554
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment | 1,487 | 1,598 |
Impaired Financing Receivable, with No Related Allowance, Interest Income, Cash Basis Method | 0 | 4 |
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 923 |  | 0
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance | 891 |  | 0
Related allowance | 416 |  | 0
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment | 596 | 0 |
Impaired Financing Receivable, with Related Allowance, Interest Income, Cash Basis Method | 0 | 0 |
Automobiles | Loans to individuals [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 355 |  | 440
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance | 396 |  | 475
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment | 356 | 350 |
Impaired Financing Receivable, with No Related Allowance, Interest Income, Cash Basis Method | 0 | 4 |
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 0 |  | 0
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance | 0 |  | 0
Related allowance | 0 |  | 0
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment | 0 | 0 |
Impaired Financing Receivable, with Related Allowance, Interest Income, Cash Basis Method | 0 | 0 |
Other Consumer Loans | Loans to individuals [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 74 |  | 88
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance | 74 |  | 88
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment | 76 | 85 |
Impaired Financing Receivable, with No Related Allowance, Interest Income, Cash Basis Method | 0 | 0 |
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 0 |  | 0
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance | 0 |  | 0
Related allowance | 0 |  | 0
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment | 0 | 0 |
Impaired Financing Receivable, with Related Allowance, Interest Income, Cash Basis Method | 0 | 0 |
Construction Residential | Construction |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 0 |  | 0
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance | 0 |  | 0
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 0 |  | 0
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance | 0 |  | 0
Related allowance | 0 |  | 0
Construction Residential | Real estate construction [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment | 0 | 0 |
Impaired Financing Receivable, with No Related Allowance, Interest Income, Cash Basis Method | 0 | 0 |
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment | 0 | 0 |
Impaired Financing Receivable, with Related Allowance, Interest Income, Cash Basis Method | 0 | 0 |
Construction Other | Construction |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 0 |  | 0
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance | 0 |  | 0
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 0 |  | 0
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance | 0 |  | 0
Related allowance | 0 |  | 0
Construction Other | Real estate construction [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment | 0 | 0 |
Impaired Financing Receivable, with No Related Allowance, Interest Income, Cash Basis Method | 0 | 0 |
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment | 0 | 0 |
Impaired Financing Receivable, with Related Allowance, Interest Income, Cash Basis Method | 0 | 0 |
Time and Demand Loans Other | Commercial, financial, agricultural and other [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 0 |  | 0
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance | 0 |  | 0
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment | 0 | 0 |
Impaired Financing Receivable, with No Related Allowance, Interest Income, Cash Basis Method | 0 | 0 |
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 0 |  | 0
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance | 0 |  | 0
Related allowance | 0 |  | 0
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment | 0 | 0 |
Impaired Financing Receivable, with Related Allowance, Interest Income, Cash Basis Method | 0 | 0 |
Equipment Finance | Commercial, financial, agricultural and other [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 201 |  | 0
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance | 209 |  | 0
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment | 238 | 0 |
Impaired Financing Receivable, with No Related Allowance, Interest Income, Cash Basis Method | 0 | 0 |
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 0 |  | 0
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance | 0 |  | 0
Related allowance | 0 |  | $ 0
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment | 0 | 0 |
Impaired Financing Receivable, with Related Allowance, Interest Income, Cash Basis Method | $ 0 | $ 0 |

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