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DEPOSITS - Summary of Deposit Balances (Detail) - USD ($)
$ in Thousands
Mar. 31, 2023
Dec. 31, 2022
Deposits, by Type [Abstract]    
Non-interest-bearing deposit accounts $ 6,024,304 $ 6,112,884
Interest-bearing savings accounts 3,808,182 3,902,888
Interest-bearing checking accounts 3,547,963 3,770,993
Certificates of deposit ("CDs") 2,418,611 2,250,876
Brokered CDs 252,905 105,826
Total deposits $ 16,051,965 $ 16,143,467