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Allowance for Credit Losses - Effect of Loan Modification (Detail)	3 Months Ended	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2024	Sep. 30, 2023
Combination - Term Extension/Rate Change | Commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Weighted average increase term	60 months
Payment Delay / Term Extension | Farmland
Financing Receivable, Troubled Debt Restructuring [Line Items]
Weighted average increase term			12 months
Payment Delay / Term Extension | Commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Weighted average increase term		53 months	12 months
Multifamily | Combination - Term Extension/Rate Change
Financing Receivable, Troubled Debt Restructuring [Line Items]
Weighted average increase term	12 months
CRE non-owner occupied | Combination - Term Extension/Rate Change
Financing Receivable, Troubled Debt Restructuring [Line Items]
Weighted average increase term		120 months
SFR HELOCs and junior liens | Payment Delay / Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Weighted average increase term		60 months

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- Definition

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Period of increase in weighted average maturity of financing receivable modified for debtor experiencing financial difficulty, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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