CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME/(LOSS) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Statement of Comprehensive Income [Abstract]
Net income	$ 13,316	$ 12,239
Other comprehensive income/(loss), before tax:
Foreign currency translation adjustments	12,741	$ (35,683)
Pension/postretirement plan remeasurement	(170)
Amortization of pension liability adjustments:
Prior service credit	(1,113)	$ (1,109)
Net actuarial loss	1,278	1,505
Payments related to derivatives included in earnings	281	486
Derivative valuation adjustment	(2,852)	$ (1,107)
Income taxes related to items of other comprehensive income/(loss):
Pension/postretirement plan remeasurement	65
Amortization of pension liability adjustment	(49)	$ (139)
Payments related to derivatives included in earnings	(107)	(190)
Derivative valuation adjustment	1,084	432
Comprehensive income/(loss)	24,474	(23,566)
Comprehensive (loss)/income attributable to the noncontrolling interest	(188)	27
Comprehensive income/(loss) attributable to the Company	$ 24,662	$ (23,593)