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DEPOSITS AND RELATED INTEREST - Summary of Deposit Balances (Detail) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Deposits, by Type [Abstract]    
Non-interest-bearing deposit accounts $ 6,112,884 $ 7,027,513
Interest-bearing savings accounts 3,902,888 4,729,387
Interest-bearing checking accounts 3,770,993 3,492,645
Certificates of deposit ("CDs") 2,250,876 2,434,932
Brokered CDs 105,826 100,417
Total deposits $ 16,143,467 $ 17,784,894