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INCOME TAXES - Summary of Income Tax Expense (Benefit) (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Income Tax Disclosure [Abstract] |  |  |
Current expense | $ 934 | $ 1,097 | $ 1,260
Deferred expense (benefit) | 1,776 | 543 | 443
Expense due to enactment of federal tax reform legislation | 0 | 0 | 2,635
Income tax expense | $ 2,710 | $ 1,640 | $ 4,338

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