EMPLOYEE BENEFITS (Details 4) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax [Abstract]
Total recognized in other Comprehensive (income) loss	$ 899	$ 5,945	$ 26,163
Pension Plan [Member]
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax [Abstract]
Net (gain) loss arising during period	5,794	9,543	30,044
Amortization of transition asset	253	258	286
Amortization of prior service credit	311	318	808
Other (gain) loss	0	0	0
Amortization of (loss)	(4,317)	(3,289)	(2,539)
Foreign currency exchange impact	(1,267)	(835)	(2,503)
Total recognized in other Comprehensive (income) loss	774	5,995	26,096
Net recognized in net periodic benefit cost and other comprehensive (income) loss	4,304	8,017	27,496
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	67	(100)	10
Amortization of transition asset	0	0	0
Amortization of prior service credit	0	0	0
Other (gain) loss	0	0	0
Amortization of (loss)	58	51	57
Foreign currency exchange impact	0	0	0
Total recognized in other Comprehensive (income) loss	125	(49)	67
Net recognized in net periodic benefit cost and other comprehensive (income) loss	$ 154	$ (14)	$ 108