OTHER COMPREHENSIVE INCOME (LOSS) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
OTHER COMPREHENSIVE INCOME (LOSS)
Unrealized holding (losses) gains on available for sale securities	$ (6,428)	$ (2,489)	$ 13,315
Reclassification adjustment for (gains) losses realized in income	(449)	8	1,090
Income tax effect	2,795	1,047	(5,718)
Net change in unrealized (losses) gains on available for sale securities	(4,082)	(1,434)	8,687
Unrealized net (loss) gain arising during the period	(1,452)	196	(5,529)
Reclassification adjustment for amortization realized in income	384	358	(23)
Income tax effect	438	(174)	2,204
Net change in post-retirement obligation	(630)	380	(3,348)
Change in fair value of derivatives used for cash flow hedges	1,191	(1,008)	(1,249)
Reclassification adjustment for losses realized in income	944	657	470
Income tax effect	(865)	150	309
Net change in unrealized gain (loss) on cash flow hedges	1,270	(201)	(470)
Other comprehensive (loss) income	$ (3,442)	$ (1,255)	$ 4,869