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Allowance for Credit Losses - Effect of Loan Modification (Detail) - Payment Delay / Term Extension	3 Months Ended
	Mar. 31, 2024
CRE non-owner occupied
Financing Receivable, Troubled Debt Restructuring [Line Items]
Weighted average increase term	120 months
SFR HELOCs and junior liens
Financing Receivable, Troubled Debt Restructuring [Line Items]
Weighted average increase term	60 months
Commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Weighted average increase term	12 months
Commercial and industrial | Commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Weighted average increase term	66 months

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

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.

+ References

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-Section 55
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