OTHER COMPREHENSIVE LOSS (Details 1) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance	$ (1,337)	$ (2,452)	$ (2,132)
Total other comprehensive income (loss)	(494)	1,115	(320)
Ending Balance	(1,831)	(1,337)	(2,452)
Unrealized Gain (Loss) on Securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance	173	1,306	3,389
Total other comprehensive income (loss)	(677)	(1,133)	(2,083)
Ending Balance	(504)	173	1,306
Unrealized Gain (Loss) on Cash Flow Hedge
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance	361	(1,955)	(3,298)
Total other comprehensive income (loss)	587	2,316	1,343
Ending Balance	948	361	(1,955)
Deferred Gain on Hedge Transactions
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance	281	427	571
Total other comprehensive income (loss)	(144)	(146)	(144)
Ending Balance	137	281	427
Defined Benefit Postretirement Plans
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance	(2,152)	(2,230)	(2,794)
Total other comprehensive income (loss)	(260)	78	564
Ending Balance	$ (2,412)	$ (2,152)	$ (2,230)