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Deposits - Components of Deposits (Detail) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Deposits, by Component, Alternative [Abstract]    
Demand, non-interest bearing $ 4,459,790 $ 2,356,998
Demand, interest bearing 6,488,406 2,384,691
Savings, including money market deposit accounts 5,322,390 5,916,309
Time 507,338 651,931
Total deposits $ 16,777,924 $ 11,309,929