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INCOME TAXES - Additional Information (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Income tax expense (benefit)	$ 2,700,000	$ (5,800,000)
Effective tax rate (percent)	27.90%	(209.50%)
Tax credit		$ 7,300,000
Valuation allowance	$ 0		$ 0
Net deferred tax asset	45,100,000		49,400,000
Valuation Allowance [Line Items]
Unrecognized tax benefits	1,200,000		1,200,000
Unrecognized tax benefits that would impact the effective tax rate	1,000,000
Accrued interest or penalties	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	$ 2,500,000

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

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