PENSIONS AND OTHER POST-RETIREMENT BENEFITS (Details 4) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Cost of sales
Components of the net periodic benefit cost
Net periodic benefit cost	$ 9,000
Selling, general, and administrative expenses
Components of the net periodic benefit cost
Net periodic benefit cost	5,800
Pension Benefits
Components of the net periodic benefit cost
Service cost	8,009	7,209	10,634
Interest cost	12,066	11,819	11,211
Expected return on plan assets	(13,912)	(12,523)	(13,008)
Amortization of prior service cost	14	14	32
Recognized actuarial loss	8,623	4,108	1,996
Curtailment (benefit) expense	0	0	69
Net periodic benefit cost	14,800	10,627	10,934
Other Benefits
Components of the net periodic benefit cost
Service cost	37	50	476
Interest cost	325	457	1,114
Expected return on plan assets	0	0	0
Amortization of prior service cost	(3,378)	(3,375)	(1,754)
Recognized actuarial loss	767	983	882
Curtailment (benefit) expense	0	0	(5,514)
Net periodic benefit cost	$ (2,249)	$ (1,885)	$ (4,796)