BENEFIT PLANS, Amounts Recognized in AOCI, Net of Tax (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Amounts recognized in AOCI, net of tax [Abstract]
Net (gain) loss	$ (1,147)	$ 0	$ 0
Total	(168)	(3,322)	$ 4,567
Pension Benefits [Member]
Amounts recognized in AOCI, net of tax [Abstract]
Prior service cost/(credit)	424	(26)
Net (gain) loss	(851)	(3,517)
Total	(427)	(3,543)
Post-retirement Benefits [Member]
Amounts recognized in AOCI, net of tax [Abstract]
Prior service cost/(credit)	111	110
Net (gain) loss	148	111
Total	$ 259	$ 221