EMPLOYEE BENEFITS (Details 4) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax [Abstract]
Total recognized in other Comprehensive (income) loss	$ 26,163	$ (23,689)	$ 8,328
Pension Plan [Member]
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax [Abstract]
Net (gain) loss arising during period	30,044	(20,977)	12,533
Amortization of transition asset	286	272	269
Amortization of prior service credit	808	393	54
Other (gain) loss	0	0	(3,216)
Amortization of (loss)	(2,539)	(3,452)	(2,417)
Foreign currency exchange impact	(2,503)	268	713
Total recognized in other Comprehensive (income) loss	26,096	(23,496)	7,936
Net recognized in net periodic benefit cost and other comprehensive (income) loss	27,496	(21,392)	9,940
Other Postretirement Benefit Plan [Member]
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax [Abstract]
Net (gain) loss arising during period	10	(452)	30
Amortization of transition asset	0	0	0
Amortization of prior service credit	0	254	353
Other (gain) loss	0	0	0
Amortization of (loss)	57	5	7
Foreign currency exchange impact	0	0	0
Total recognized in other Comprehensive (income) loss	67	(193)	390
Net recognized in net periodic benefit cost and other comprehensive (income) loss	$ 108	$ (342)	$ 159