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INCOME TAXES - Summary of Income Tax Expense (Benefit) (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Income Tax Disclosure [Abstract]      
Current expense $ 6,602 $ 934 $ 1,097
Deferred expense (benefit) (554) 1,776 543
Income tax expense $ 6,048 $ 2,710 $ 1,640