GOODWILL AND OTHER INTANGIBLE ASSETS - Schedule of Goodwill (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 18,480,000	$ 18,480,000	$ 17,779,000
Goodwill resulting from branch acquisition		701,000	701,000
Goodwill, ending balance	18,480,000	18,480,000	18,480,000
Intangible Assets, Other Disclosures
Goodwill impairment	0	0
Core Deposit Intangible
Finite-lived Intangible Assets
Gross, beginning balance	1,006,000	1,006,000	128,000
Accumulated depreciation, beginning balance	(262,000)	(161,000)	(127,000)
Net, beginning balance	744,000	845,000	1,000
Accumulated Amortization expense	(98,000)	(101,000)	(34,000)
Core deposit intangible resulting from branch acquisition		878,000	878,000
Gross, ending balance	1,006,000	1,006,000	1,006,000
Accumulated depreciation, ending balance	(360,000)	(262,000)	(161,000)
Net, ending balance	$ 646,000	744,000	845,000
Intangible Assets, Other Disclosures
Amortization period	10 years
Impairment charges	$ 0	$ 0	$ 0