CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME [Abstract]
Net income	$ 47,041	$ 16,733
Other comprehensive (loss)/income, before tax:
Foreign currency translation adjustments	13,318	25,912
Pension settlement	8,153
Amortization of pension liability adjustment
Transition obligation	19	22
Prior service cost/(credit)	(908)	(908)
Net actuarial loss	2,577	2,175
Derivative valuation adjustment	(346)	660
Income taxes related to items of other comprehensive (loss)/income:
Pension settlement	(2,144)
Amortization of Pension liability adjustment	(523)	(400)
Derivative valuation adjustment	135	(257)
Other comprehensive income, net of tax	20,281	27,204
Comprehensive income	$ 67,322	$ 43,937