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Financial Instruments with Off-Balance-Sheet Risk - Narrative (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Commitments and Contingencies Disclosure [Abstract]    
Lending-related commitments, expense (benefit) $ 0.9 $ (0.2)
Allowance for credit losses on lending-related commitments $ 3.0 $ 2.1