Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
Statement of Comprehensive Income [Abstract]
Net income	$ 20,905		$ 18,481		$ 243,704		$ 65,519
Other comprehensive (loss) income, net of tax
Unrealized (loss) income on hedging activities, net of tax (1)	(144)	[1]	95	[1]	202	[1]	(302)	[1]
Foreign currency translation adjustments, net of tax (2)	21,876	[2]	24,567	[2]	10,344	[2]	14,112	[2]
Defined benefit pension and other postretirement benefits, net of tax (3)	1,874	[3]	394	[3]	19,814	[3]	4,305	[3]
Total other comprehensive income, net of tax	23,606		25,056		30,360		18,115
Total comprehensive income	44,511		43,537		274,064		83,634
Unrealized (loss) income on hedging activities, tax	(106)		(106)		331		(425)
Foreign currency translation adjustment, tax	843		1,587		332		1,095
Defined benefit pension and other postretirement benefits, tax	$ 1,500		$ 687		$ 12,871		$ 2,848

[1] Net of tax of $(106) and $(106) for the three months ended September 30, 2013 and 2012, respectively, and $331 and $(425) for the nine months ended September 30, 2013 and 2012, respectively.

[2] Net of tax of $843 and $1,587 for the three months ended September 30, 2013 and 2012, respectively, and $332 and $1,095 for the nine months ended September 30, 2013 and 2012, respectively.

[3] Net of tax of $1,500 and $687 for the three months ended September 30, 2013 and 2012, respectively, and $12,871 and $2,848 for the nine months ended September 30, 2013 and 2012, respectively.