Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Statement of Comprehensive Income [Abstract]
Net income		$ 33,671	$ 33,877	$ 96,974	$ 86,858
Other comprehensive income (loss), net of tax
Unrealized (loss) gain on hedging activities, net of tax (1)	[1]	(174)	564	127	33
Foreign currency translation adjustments, net of tax (2)	[2]	(22,722)	(41,279)	(38,847)	(51,837)
Defined benefit pension and other postretirement benefits, net of tax (3)	[3]	3,592	2,863	9,043	(1,518)
Total other comprehensive loss, net of tax		(19,304)	(37,852)	(29,677)	(53,322)
Total comprehensive income (loss)		14,367	(3,975)	67,297	33,536
Unrealized (loss) income on hedging activities, tax		(96)	256	(64)	62
Foreign currency translation adjustment, tax		(188)	(1,376)	(1,569)	(2,143)
Defined benefit pension and other postretirement benefits, tax		$ 1,383	$ 869	$ 4,150	$ (2,121)

[1] Net of tax of $(96) and $256 for the three months ended September 30, 2015 and 2014, respectively, and $(64) and $62 for the nine months ended September 30, 2015 and 2014, respectively.

[2] Net of tax of $(188) and $(1,376) for the three months ended September 30, 2015 and 2014, respectively, and $(1,569) and $(2,143) for the nine months ended September 30, 2015 and 2014, respectively.

[3] Net of tax of $1,383 and $869 for the three months ended September 30, 2015 and 2014, respectively, and $4,150 and $(2,121) for the nine months ended September 30, 2015 and 2014, respectively.