PENSION PLANS (Details 2) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Defined Benefit Pension Plans
Components of net periodic benefit cost
Service cost - benefits earned during the period	$ 13,460	$ 12,876	$ 12,584
Interest cost on projected benefit obligation	35,267	34,484	33,776
Expected return on plan assets	(40,332)	(39,863)	(40,780)
Settlement gain	(3,283)	(6)	(5)
Curtailment gain	(2,200)
Amortization of unrecognized transition obligation	248	236	247
Amortization of prior service cost	2,078	2,592	2,367
Recognized actuarial net loss	23,383	16,221	10,594
Net periodic benefit (income)	28,621	26,540	18,783
U.S. Pension Plans
Components of net periodic benefit cost
Service cost - benefits earned during the period	10,484	10,066
Interest cost on projected benefit obligation	31,409	30,992
Defined benefit plan amendment, affected participant population, numerator	2
Defined benefit plan amendment, affected participant population, denominator	3
Non-U.S. Pension Plans
Components of net periodic benefit cost
Service cost - benefits earned during the period	2,976	2,811
Interest cost on projected benefit obligation	$ 3,859	$ 3,492