SUBORDINATED DEBENTURES (Additional Information) (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Jun. 30, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Jan. 06, 2017	Aug. 10, 2004
Subordinated Borrowing [Line Items]
Subordinated Debentures		$ 0	$ 30,000
Repayments of Subordinated Debt		$ 30,000	5,000	$ 0
Capital Trust II, Trust Preferred Securities [Member] | Subordinated Debt [Member]
Subordinated Borrowing [Line Items]
Debt Instrument, Issuance Date		Aug. 10, 2004
Subordinated Debentures						$ 35,000
Repayments of Subordinated Debt	$ 5,000
Debt Instrument, Repurchase Amount	5,000				$ 30,000
Gain (Loss) on Repurchase of Debt Instrument	$ 1,200
Long-term Debt, outstanding amount			$ 30,000