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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 | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Financing Receivable Nonaccrual Status [Line Items] |  |
Nonaccrual | $ 93,853 | $ 59,971
Nonaccrual With Reserve | 28,768 | 2,534
Loans Past Due Over 90 Days Still Accruing | 5,034 | 4,130
Commercial real estate loans | Non-farm/non-residential |  |
Financing Receivable Nonaccrual Status [Line Items] |  |
Nonaccrual | 35,868 | 13,178
Nonaccrual With Reserve | 28,768 | 0
Loans Past Due Over 90 Days Still Accruing | 304 | 2,177
Commercial real estate loans | Construction/ Land Development |  |
Financing Receivable Nonaccrual Status [Line Items] |  |
Nonaccrual | 3,702 | 12,094
Nonaccrual With Reserve | 0 | 0
Loans Past Due Over 90 Days Still Accruing | 600 | 255
Commercial real estate loans | Agricultural |  |
Financing Receivable Nonaccrual Status [Line Items] |  |
Nonaccrual | 559 | 431
Nonaccrual With Reserve | 0 | 0
Loans Past Due Over 90 Days Still Accruing | 0 | 0
Residential Real Estate | Residential 1-4 family |  |
Financing Receivable Nonaccrual Status [Line Items] |  |
Nonaccrual | 22,539 | 20,351
Nonaccrual With Reserve | 0 | 0
Loans Past Due Over 90 Days Still Accruing | 1,835 | 84
Residential Real Estate | Multifamily residential |  |
Financing Receivable Nonaccrual Status [Line Items] |  |
Nonaccrual | 13,083 | 0
Nonaccrual With Reserve | 0 | 0
Loans Past Due Over 90 Days Still Accruing | 0 | 0
Total real estate |  |
Financing Receivable Nonaccrual Status [Line Items] |  |
Nonaccrual | 75,751 | 46,054
Nonaccrual With Reserve | 28,768 | 0
Loans Past Due Over 90 Days Still Accruing | 2,739 | 2,516
Consumer |  |
Financing Receivable Nonaccrual Status [Line Items] |  |
Nonaccrual | 6,178 | 3,423
Nonaccrual With Reserve | 0 | 0
Loans Past Due Over 90 Days Still Accruing | 32 | 79
Commercial & Industrial |  |
Financing Receivable Nonaccrual Status [Line Items] |  |
Nonaccrual | 10,931 | 9,982
Nonaccrual With Reserve | 0 | 2,534
Loans Past Due Over 90 Days Still Accruing | 2,263 | 1,535
Agricultural & other |  |
Financing Receivable Nonaccrual Status [Line Items] |  |
Nonaccrual | 993 | 512
Nonaccrual With Reserve | 0 | 0
Loans Past Due Over 90 Days Still Accruing | $ 0 | $ 0

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