ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
OTHER COMPREHENSIVE INCOME (LOSS)
Unrealized holding losses on available for sale securities	$ (1,107)	$ (6,428)	$ (2,489)
Reclassification adjustment for (gains) losses realized in income	(38)	(449)	8
Income tax effect	640	2,795	1,047
Net change in unrealized losses on available for sale securities	(505)	(4,082)	(1,434)
Unrealized net (loss) gain arising during the period	(302)	(1,452)	196
Reclassification adjustment for amortization realized in income	480	384	358
Income tax effect	15	438	(174)
Net change in post-retirement obligation	193	(630)	380
Change in fair value of derivatives used for cash flow hedges	463	1,191	(1,008)
Reclassification adjustment for losses realized in income	1,419	944	657
Income tax effect	(793)	(865)	150
Net change in unrealized gain (loss) on cash flow hedges	1,089	1,270	(201)
Other comprehensive income (loss)	$ 777	$ (3,442)	$ (1,255)