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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 | Mar. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Financing Receivable Nonaccrual Status [Line Items] |  |
Nonaccrual | $ 86,383 | $ 93,853
Nonaccrual with Reserve | 28,358 | 28,768
Loans Past Due Over 90 Days Still Accruing | 3,264 | 5,034
Commercial real estate loans | Non-farm/non-residential |  |
Financing Receivable Nonaccrual Status [Line Items] |  |
Nonaccrual | 32,953 | 35,868
Nonaccrual with Reserve | 28,358 | 28,768
Loans Past Due Over 90 Days Still Accruing | 226 | 304
Commercial real estate loans | Construction/land development |  |
Financing Receivable Nonaccrual Status [Line Items] |  |
Nonaccrual | 2,061 | 3,702
Nonaccrual with Reserve | 0 | 0
Loans Past Due Over 90 Days Still Accruing | 0 | 600
Commercial real estate loans | Agricultural |  |
Financing Receivable Nonaccrual Status [Line Items] |  |
Nonaccrual | 538 | 559
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 | 23,510 | 22,539
Nonaccrual with Reserve | 0 | 0
Loans Past Due Over 90 Days Still Accruing | 306 | 1,835
Residential real estate loans | Multifamily residential |  |
Financing Receivable Nonaccrual Status [Line Items] |  |
Nonaccrual | 13,075 | 13,083
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 | 72,137 | 75,751
Nonaccrual with Reserve | 28,358 | 28,768
Loans Past Due Over 90 Days Still Accruing | 532 | 2,739
Consumer |  |
Financing Receivable Nonaccrual Status [Line Items] |  |
Nonaccrual | 6,014 | 6,178
Nonaccrual with Reserve | 0 | 0
Loans Past Due Over 90 Days Still Accruing | 11 | 32
Commercial and industrial |  |
Financing Receivable Nonaccrual Status [Line Items] |  |
Nonaccrual | 7,619 | 10,931
Nonaccrual with Reserve | 0 | 0
Loans Past Due Over 90 Days Still Accruing | 2,380 | 2,263
Agricultural & other |  |
Financing Receivable Nonaccrual Status [Line Items] |  |
Nonaccrual | 613 | 993
Nonaccrual with Reserve | 0 | 0
Loans Past Due Over 90 Days Still Accruing | $ 341 | $ 0

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