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Borrowed Funds - Components of Borrowed Funds (Parenthetical) (Detail)	Mar. 31, 2026	Dec. 31, 2025
Subordinated notes 6.25%, net of issuance costs [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate	6.25%	6.25%
Subordinated notes 2.75% [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate	2.75%	2.75%

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

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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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