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Allowance for Credit Losses, Credit Quality and Other - Amortized Cost Basis of Loans on Nonaccrual Status and Loans Past Due Over 90 Days Still Accruing (Detail) - USD ($) $ in Thousands | Jun. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Financing Receivable Nonaccrual Status [Line Items] |  |
Nonaccrual | $ 78,090 | $ 59,971
Nonaccrual with Reserve | 2,252 | 2,534
Loans Past Due Over 90 Days Still Accruing | 8,251 | 4,130
Commercial real estate loans | Non-farm/non-residential |  |
Financing Receivable Nonaccrual Status [Line Items] |  |
Nonaccrual | 35,621 | 13,178
Nonaccrual with Reserve | 0 | 0
Loans Past Due Over 90 Days Still Accruing | 4,387 | 2,177
Commercial real estate loans | Construction/land development |  |
Financing Receivable Nonaccrual Status [Line Items] |  |
Nonaccrual | 5,516 | 12,094
Nonaccrual with Reserve | 0 | 0
Loans Past Due Over 90 Days Still Accruing | 603 | 255
Commercial real estate loans | Agricultural |  |
Financing Receivable Nonaccrual Status [Line Items] |  |
Nonaccrual | 612 | 431
Nonaccrual with Reserve | 0 | 0
Loans Past Due Over 90 Days Still Accruing | 0 | 0
Residential real estate loans | Residential 1-4 family |  |
Financing Receivable Nonaccrual Status [Line Items] |  |
Nonaccrual | 23,051 | 20,351
Nonaccrual with Reserve | 0 | 0
Loans Past Due Over 90 Days Still Accruing | 716 | 84
Residential real estate loans | Multifamily residential |  |
Financing Receivable Nonaccrual Status [Line Items] |  |
Nonaccrual |  | 0
Nonaccrual with Reserve |  | 0
Loans Past Due Over 90 Days Still Accruing | 0 | 0
Total real estate |  |
Financing Receivable Nonaccrual Status [Line Items] |  |
Nonaccrual | 64,800 | 46,054
Nonaccrual with Reserve | 0 | 0
Loans Past Due Over 90 Days Still Accruing | 5,706 | 2,516
Consumer |  |
Financing Receivable Nonaccrual Status [Line Items] |  |
Nonaccrual | 3,908 | 3,423
Nonaccrual with Reserve | 0 | 0
Loans Past Due Over 90 Days Still Accruing | 10 | 79
Commercial and industrial |  |
Financing Receivable Nonaccrual Status [Line Items] |  |
Nonaccrual | 9,226 | 9,982
Nonaccrual with Reserve | 2,252 | 2,534
Loans Past Due Over 90 Days Still Accruing | 2,463 | 1,535
Agricultural & other |  |
Financing Receivable Nonaccrual Status [Line Items] |  |
Nonaccrual | 156 | 512
Nonaccrual with Reserve | 0 | 0
Loans Past Due Over 90 Days Still Accruing | $ 72 | $ 0

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