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DEPOSITS - Summary of Deposit Balances (Detail) - USD ($)
$ in Thousands
Sep. 30, 2024
Dec. 31, 2023
Deposits, by Type [Abstract]    
Non-interest-bearing deposit accounts $ 5,275,733 $ 5,404,121
Interest-bearing checking accounts 3,909,255 3,937,945
Interest-bearing saving accounts 3,575,093 3,596,855
Time deposits 3,067,261 2,833,730
Brokered certifiates of deposits ("CDs") 520,048 783,334
Total deposits $ 16,347,390 $ 16,555,985