INCOME TAXES - Deferred Income Tax Assets and (Liabilities) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Components of Deferred Tax Assets and Liabilities
Allowance for loan losses	$ 2,798,000	$ 2,641,000
Minimum pension liability	1,342,000	1,786,000
Unrealized loss on securities available-for-sale	2,000	1,066,000
Gross deferred tax assets	4,142,000	5,493,000
Depreciation	(1,137,000)	(1,352,000)
Pension	(21,000)	(6,000)
Goodwill	(1,523,000)	(465,000)
Gross deferred tax liabilities	(2,681,000)	(1,823,000)
Net deferred tax asset	1,461,000	$ 3,670,000
Deferred tax asset, income tax charge	646,000
Deferred income tax valuation allowance	0
Liability for uncertain tax positions	0
Unrecognized tax benefits	$ 0