Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Statement of Comprehensive Income [Abstract]
Net income	$ 33,877		$ 20,905		$ 86,858		$ 243,704
Other comprehensive (loss) income, net of tax
Unrealized gain (loss) on hedging activities, net of tax (1)	564	[1]	(144)	[1]	33	[1]	202	[1]
Foreign currency translation adjustments, net of tax (2)	(41,279)	[2]	21,876	[2]	(51,837)	[2]	10,344	[2]
Defined benefit pension and other postretirement benefits, net of tax (3)	2,863	[3]	1,874	[3]	(1,518)	[3]	19,814	[3]
Total other comprehensive (loss) income, net of tax	(37,852)		23,606		(53,322)		30,360
Total comprehensive (loss) income	(3,975)		44,511		33,536		274,064
Unrealized (loss) income on hedging activities, tax	256		(106)		62		331
Foreign currency translation adjustment, tax	(1,376)		843		(2,143)		332
Defined benefit pension and other postretirement benefits, tax	$ 869		$ 1,500		$ (2,121)		$ 12,871

[1] Net of tax of $256 and $(106) for the three months ended September 30, 2014 and 2013, respectively, and $62 and $331 for the nine months ended September 30, 2014 and 2013, respectively.

[2] Net of tax of $(1,376) and $843 for the three months ended September 30, 2014 and 2013, respectively, and $(2,143) and $332 for the nine months ended September 30, 2014 and 2013, respectively.

[3] Net of tax of $869 and $1,500 for the three months ended September 30, 2014 and 2013, respectively, and $(2,121) and $12,871 for the nine months ended September 30, 2014 and 2013, respectively.