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Allowance for Credit Losses, Credit Quality and Other - Presentation of TDR's on Non-Accrual Status (Detail) - Combination Interest Rate Reduction and Term Extension $ in Thousands	6 Months Ended
	Jun. 30, 2025 USD ($)
Financing Receivable, Modifications [Line Items]
Payment default loans	$ 1,174
Commercial real estate loans | Non-farm/non-residential
Financing Receivable, Modifications [Line Items]
Payment default loans	0
Residential real estate loans | Residential 1-4 family
Financing Receivable, Modifications [Line Items]
Payment default loans	1,173
Total real estate
Financing Receivable, Modifications [Line Items]
Payment default loans	1,173
Consumer
Financing Receivable, Modifications [Line Items]
Payment default loans	0
Commercial and industrial
Financing Receivable, Modifications [Line Items]
Payment default loans	$ 1

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Amortized cost of financing receivable with payment default in current period and modified within previous 12 months preceding payment default for debtor experiencing financial difficulty.

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