COMPREHENSIVE INCOME - Components of comprehensive income (Details) - Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Net income	$ 6,685	$ 8,457	$ 2,521
Other comprehensive (loss) income
Net unrealized (losses) gains on securities available-for-sale	(399)	(1,297)	2,534
Reclassification of net realized gains in net income	(584)	(192)
Unrealized (losses) gains on securities available-for-sale	(983)	(1,489)	2,534
Income tax benefit (expense)	335	506	(862)
Unrealized (losses) gains on securities available-for-sale, net of tax	(648)	(983)	1,672
Pension plan expense (see Note 14)			(924)
Income tax benefit			314
Pension plan expense, net of tax			(610)
Other comprehensive (loss) income, net of tax	(648)	(983)	1,062
Comprehensive income	$ 6,037	$ 7,474	$ 3,583