CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME [Abstract]
Net income	$ 11,511	$ 47,041
Other comprehensive (loss)/income, before tax:
Foreign currency translation adjustments	(10,622)	13,318
Pension settlement		8,153
Amortization of pension liability adjustment
Transition obligation	17	19
Prior service cost/(credit)	(908)	(908)
Net actuarial loss	1,664	2,577
Derivative valuation adjustment	457	(346)
Income taxes related to items of other comprehensive (loss)/income:
Pension settlement		(2,144)
Amortization of pension liability adjustment	(270)	(523)
Derivative valuation adjustment	(178)	135
Other comprehensive (loss)/income, net of tax	(9,840)	20,281
Comprehensive income	$ 1,671	$ 67,322