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DEPOSITS - Composition of Deposits (Detail) - USD ($)
$ in Thousands
Mar. 31, 2022
Dec. 31, 2021
Deposits [Abstract]    
Noninterest-bearing deposits $ 4,039,797 $ 3,779,630
Interest-bearing deposits:    
Demand 1,410,183 1,604,714
Money market savings 3,478,143 3,415,663
Regular savings 562,092 533,862
Time deposits of less than $250,000 996,864 910,464
Time deposits of $250,000 or more 365,715 380,398
Total interest-bearing deposits 6,812,997 6,845,101
Total deposits $ 10,852,794 $ 10,624,731