Consolidated Statements of Comprehensive Income/(Loss) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Consolidated Statements of Comprehensive Income/(Loss) [Abstract]
Net income	$ 41,749	$ 17,658	$ 30,977
Other comprehensive income, before tax:
Foreign currency translation adjustments	(54,850)	8,135	11,865
Pension/postretirement settlements and curtailments	8,377	46	118,350
Pension/postretirement plan remeasurement	(14,707)	20,500	(48,233)
Pension/postretirement plan amendments		7,361
Amortization of pension liability adjustments:
Transition obligation		70	79
Prior service (credit)/cost	(4,436)	(3,905)	(3,631)
Net actuarial loss	5,329	6,512	7,438
Payments related to interest rate swaps included in earnings	1,914	1,900	1,700
Derivative valuation adjustment	(1,724)	1,216	(2,167)
Income taxes related to items of other comprehensive income:
Pension/postretirement settlements and curtailments	(3,210)	(18)	(39,146)
Pension/postretirement plan remeasurement	5,442	(6,757)	14,711
Pension/postretirement plan amendments		(2,871)
Amortization of pension liability adjustment	(330)	(451)	(1,360)
Payments related to interest rate swaps included in earnings	(746)	(741)	(663)
Derivative valuation adjustment	672	(474)	845
Comprehensive (loss)/income	(16,520)	48,181	90,765
Net income and comprehensive loss attributable to the noncontrolling interest	178
Comprehensive (loss)/income attributable to the Company	$ (16,342)	$ 48,181	$ 90,765