CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME [Abstract]
Net income/(loss)	$ (7,379)	$ (33,745)	$ 4,132	$ 13,296
Other comprehensive (loss)/income, before tax:
Foreign currency translation adjustments	(2,647)	(20,540)	(13,269)	(7,222)
Pension settlement		110,197		118,350
Pension plan remeasurement		(24,617)		(24,617)
Amortization of pension liability adjustment
Transition obligation	17	18	34	37
Prior service (credit)/cost	(909)	(909)	(1,817)	(1,817)
Net actuarial loss	1,664	1,870	3,328	4,447
Derivative valuation adjustment	2,414	(318)	2,871	(664)
Income taxes related to items of other comprehensive (loss)/income:
Pension settlement		(37,002)		(39,146)
Pension plan remeasurement		7,270		7,270
Amortization of pension liability adjustment	(271)	(304)	(541)	(827)
Derivative valuation adjustment	(941)	124	(1,119)	259
Other comprehensive (loss)/income, net of tax	(673)	35,789	(10,513)	56,070
Comprehensive (loss)/income	$ (8,052)	$ 2,044	$ (6,381)	$ 69,366