GOODWILL AND OTHER INTANGIBLES - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Gross carrying value	$ 17,380,000	$ 17,380,000
Accumulated amortization	276,000	276,000
Goodwill	17,104,000	17,104,000
Goodwill impairment loss	0	$ 0	$ 0
Core Deposit Intangible
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	598,000
Accumulated amortization	1,283,000
Trade Name Intangible
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	43,000
Accumulated amortization	90,000
Book of Business Intangible
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	821,000
Accumulated amortization	$ 199,000