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INCOME TAXES - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Income tax expense (benefit)	$ 4,300,000	$ 2,100,000	$ 7,000,000.0	$ (3,700,000)
Effective tax rate (percent)	20.60%	12.60%	22.90%	(18.60%)
Tax credit	$ 1,700,000	$ 1,900,000	$ 1,700,000	$ 9,200,000
Valuation allowance	0		0		$ 0
Net deferred tax asset	42,800,000		42,800,000		49,400,000
Valuation Allowance [Line Items]
Unrecognized tax benefits	1,300,000		1,300,000		1,200,000
Unrecognized tax benefits that would impact the effective tax rate	1,100,000		1,100,000
Accrued interest or penalties	$ 0		0		$ 0
Year-to-date temporary book-tax differences
Valuation Allowance [Line Items]
Increase (decrease) in deferred tax asset			1,800,000
Unrealized gain on securities available-for-sale
Valuation Allowance [Line Items]
Increase (decrease) in deferred tax asset			$ 4,800,000

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Income Tax Expense (Benefit), Consolidated Operations Basis Adjustment

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Amount, after allocation of valuation allowances and deferred tax liability, of deferred tax asset attributable to deductible differences and carryforwards, without jurisdictional netting.

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Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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The amount of estimated penalties and interest accrued as of the balance sheet date arising from income tax examinations.

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