OTHER COMPREHENSIVE INCOME (LOSS) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
OTHER COMPREHENSIVE INCOME (LOSS)
Unrealized holding gains (losses) on available for sale securities	$ 13,315	$ (23,771)	$ (2,321)
Reclassification adjustment for losses (gains) realized in income	1,090	(659)	(2,647)
Income tax effect	(5,718)	9,698	1,972
Net change in unrealized gains (losses) on available for sale securities	8,687	(14,732)	(2,996)
Change in post-retirement obligations	(5,552)	3,162	425
Income tax effect	2,204	(1,255)	(169)
Net change in post-retirement obligation	(3,348)	1,907	256
Change in fair value of derivatives used for cash flow hedges	(779)	12	(176)
Income tax effect	309	(5)	70
Net change in unrealized (losses) gains on cash flow hedge	(470)	7	(106)
Total	4,869	(12,818)	(2,846)
Unrealized gains (losses) on available for sale securities
Balance at the beginning of the period	(11,994)
Current Period Change	8,687	(14,732)	(2,996)
Balance at the end of the period	(3,307)	(11,994)
Unrealized (losses) on pension benefits
Balance at the beginning of the period	(1,143)
Current Period Change	(3,348)	1,907	256
Balance at the end of the period	(4,491)	(1,143)
Unrealized (losses) on cash flow hedges
Balance at the beginning of the period	(99)
Current Period Change	(470)	7	(106)
Balance at the end of the period	(569)	(99)
Total
Balance at the beginning of the period	(13,236)
Current Period Change	4,869	(12,818)	(2,846)
Balance at the end of the period	$ (8,367)	$ (13,236)