ADVANCES FROM THE FEDERAL HOME LOAN BANK (FHLB) - Advances from FHLB Mature (Detail) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Federal Home Loan Bank, Advances, Fixed Rate [Abstract]
Within one month	$ 0
Over three to six months	120,000
Over six months to one year	120,000
Over one to three years	200,000
Total	$ 440,000	$ 570,000