Loans - Summary of Loans (Parenthetical) (Detail) - Paycheck Protection Program [Member] - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Principal amount outstanding on PPP loans	$ 2.0	$ 4.6
Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Principal amount outstanding on PPP loans	$ 2.0	$ 4.6

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.

No definition available.

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