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INCOME TAXES - Additional Information (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019
Income Tax Disclosure [Abstract]
Income tax expense (benefit)	$ (2,200,000)		$ 2,700,000
Effective tax rate (percent)	24.70%		27.90%
(Loss) income from operations before income taxes	$ (8,758,000)	$ 17,083,000	$ 9,756,000
Valuation allowance	0	0
Net deferred tax asset	63,800,000	44,900,000
Valuation Allowance [Line Items]
Unrecognized tax benefits	1,000,000.0	977,000
Unrecognized tax benefits that would impact the effective tax rate	794,000
Accrued interest or penalties	0	$ 0
Unrealized gain on securities available-for-sale
Valuation Allowance [Line Items]
Increase (decrease) in deferred tax asset	17,600,000
Change in expected credit loss estimate
Valuation Allowance [Line Items]
Increase (decrease) in deferred tax asset	1,900,000
Year-to-date temporary book-tax differences
Valuation Allowance [Line Items]
Increase (decrease) in deferred tax asset	$ 600,000

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