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Restrictions on Cash and Due from Banks and Interest-earning Deposit Accounts - Additional Information (Detail) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Cash and Cash Equivalents [Abstract]    
Reserve requirement at Federal Reserve Bank $ 0  
Average balances at Federal Reserve Bank 471,700 $ 270,700
Pledging requirement for credit derivatives and SWAP agreements - cash $ 100