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Loans - Summary of Loans (Parenthetical) (Detail) - Paycheck Protection Program [Member] - USD ($)
$ in Thousands
Sep. 30, 2022
Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Principal amount outstanding on PPP loans $ 392 $ 4,600
Commercial [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Principal amount outstanding on PPP loans $ 392 $ 4,600