ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) - Changes in Accumulated Other Comprehensive Income (Loss) By Component (Details) - USD ($)	3 Months Ended					6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2016	Jun. 30, 2015
Accumulated other comprehensive income (loss) by component
Balance						$ (6,023,000)
Other comprehensive income before reclassifications, Interest rate swaps	$ 41,000					76,000	$ 21,000
Accretion of unrealized losses of securities transferred from available-for-sale to held-to-maturity recognized in other comprehensive income	121,000	$ 128,000				248,000	252,000
Net current period other comprehensive (loss) income, Unrealized (gains) losses on securities	883,000	(1,065,000)				3,507,000	(282,000)
Net current period other comprehensive (loss) income, Pension and postretirement benefit plans	75,000	67,000				150,000	134,000
Balance	(2,042,000)					(2,042,000)
Transferred From Available-For-Sale to Held-To-Maturity
Accumulated other comprehensive income (loss) by component
Transfer of securities from available-for-sale to held-to-maturity				$ 3,530,000	$ 3,530,000
Net current period other comprehensive (loss) income, Unrealized (gains) losses on securities						(2,050,000)
Unrealized Gains (Losses) on Securities | Available for sale
Accumulated other comprehensive income (loss) by component
Balance	2,790,000	2,265,000				166,000	1,482,000
Other comprehensive income before reclassifications, Unrealized (gains) losses on securities	883,000	(1,065,000)				3,507,000	(282,000)
Net current period other comprehensive (loss) income, Unrealized (gains) losses on securities						3,507,000	(282,000)
Net current periodic change, Accumulated other comprehensive income (loss)	883,000	(1,065,000)
Balance	3,673,000	1,200,000				3,673,000	1,200,000
Unrealized Gains (Losses) on Securities | Transferred From Available-For-Sale to Held-To-Maturity
Accumulated other comprehensive income (loss) by component
Balance	(2,170,000)	(2,700,000)				(2,297,000)	(2,824,000)
Transfer of securities from available-for-sale to held-to-maturity			$ 8,000
Accretion of unrealized losses of securities transferred from available-for-sale to held-to-maturity recognized in other comprehensive income	121,000	128,000				248,000	252,000
Net current period other comprehensive (loss) income, Unrealized (gains) losses on securities						(248,000)	252,000
Net current periodic change, Accumulated other comprehensive income (loss)	121,000	128,000
Balance	(2,049,000)	(2,572,000)				(2,049,000)	(2,572,000)
Pension Plan
Accumulated other comprehensive income (loss) by component
Balance	(3,662,000)	(3,328,000)				(3,737,000)	(3,395,000)
Reclassification adjustments for (gains) losses reclassified into income	75,000	67,000
Reclassification adjustments for (gains) losses reclassified into income, Pension and postretirement benefit plans							134,000
Reclassification adjustments for (gains) losses reclassified into income, Interest rate swaps						150,000
Net current period other comprehensive (loss) income, Pension and postretirement benefit plans						150,000	134,000
Net current periodic change, Accumulated other comprehensive income (loss)	75,000	67,000
Balance	(3,587,000)	(3,261,000)				(3,587,000)	(3,261,000)
Interest Rate Swap
Accumulated other comprehensive income (loss) by component
Balance	(120,000)	(290,000)				(155,000)	(311,000)
Other comprehensive income before reclassifications, Unrealized (gains) losses on securities	41,000
Other comprehensive income before reclassifications, Interest rate swaps						76,000	21,000
Net current period other comprehensive (loss) income, Interest rate swaps						76,000	21,000
Net current periodic change, Accumulated other comprehensive income (loss)	41,000
Balance	(79,000)	(290,000)				(79,000)	(290,000)
Accumulated Other Comprehensive Income (Loss)
Accumulated other comprehensive income (loss) by component
Balance	(3,162,000)	(4,053,000)				(6,023,000)	(5,048,000)
Other comprehensive income before reclassifications, Unrealized (gains) losses on securities	924,000	(1,065,000)
Other comprehensive income before reclassifications, Accumulated other comprehensive income (loss)						3,583,000	(261,000)
Accretion of unrealized losses of securities transferred from available-for-sale to held-to-maturity recognized in other comprehensive income	121,000	128,000				248,000	252,000
Reclassification adjustments for (gains) losses reclassified into income	75,000	67,000
Reclassification adjustments for (gains) losses reclassified into income, Accumulated other comprehensive income (loss)						150,000	134,000
Net current periodic change, Accumulated other comprehensive income (loss)	1,120,000	(870,000)				3,981,000	125,000
Balance	$ (2,042,000)	$ (4,923,000)				$ (2,042,000)	$ (4,923,000)