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Deposits - Schedule of Maturities of Total Time Deposits (Detail)
$ in Thousands
Dec. 31, 2020
USD ($)
Maturities of Time Deposits [Abstract]  
Due in 2021 $ 825,822
Due in 2022 139,466
Due in 2023 82,288
Due in 2024 37,280
Due in 2025 30,947
Thereafter 7,067
Total $ 1,122,870