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Deposits - Schedule of Maturities of Certificates of Deposit (Detail)
$ in Thousands
Dec. 31, 2019
USD ($)
Banking and Thrift [Abstract]  
2020 $ 3,844,086
2021 308,955
2022 86,967
2023 17,440
2024 15,519
2025 and thereafter 675
Total time deposits $ 4,273,642