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DEPOSITS (Composition of Deposits) (Detail) - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Disclosure Composition Of Deposits [Abstract]    
Noninterest-bearing deposits $ 1,939,937 $ 1,892,052
Interest-bearing deposits:    
Demand 864,620 836,433
Money market savings 1,806,875 1,839,593
Regular savings 335,831 329,919
Time deposits of less than $100,000 456,017 463,431
Time deposits of $100,000 or more 1,190,594 1,078,891
Total interest-bearing deposits 4,653,937 4,548,267
Total deposits $ 6,593,874 $ 6,440,319