Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2013		Jun. 30, 2012		Jun. 30, 2013		Jun. 30, 2012
Statement of Comprehensive Income [Abstract]
Net income	$ 209,327		$ 24,831		$ 222,799		$ 47,038
Other comprehensive income (loss), net of tax
Unrealized (loss) gain on hedging activities, net of tax (1)	(81)	[1]	(633)	[1]	346	[1]	(397)	[1]
Foreign currency translation adjustments, net of tax (2)	2,976	[2]	(25,164)	[2]	(11,529)	[2]	(10,455)	[2]
Defined benefit pension and other postretirement benefits, net of tax (3)	15,529	[3]	2,706	[3]	17,939	[3]	3,911	[3]
Total other comprehensive income (loss), net of tax	18,424		(23,091)		6,756		(6,941)
Total comprehensive income	227,751		1,740		229,555		40,097
Unrealized (loss) gain on hedging activities, tax	249		(403)		437		(319)
Foreign currency translation adjustment, tax	(410)		(1,209)		(511)		(492)
Defined benefit pension and other postretirement benefits, tax	$ 8,534		$ 1,144		$ 11,372		$ 2,161

[1] Net of tax of $249 and $(403) for the three months ended June 30, 2013 and 2012, respectively, and $437 and $(319) for the six months ended June 30, 2013 and 2012, respectively.

[2] Net of tax of $(410) and $(1,209) for the three months ended June 30, 2013 and 2012, respectively, and $(511) and $(492) for the six months ended June 30, 2013 and 2012, respectively.

[3] Net of tax of $8,534 and $1,144 for the three months ended June 30, 2013 and 2012, respectively, and $11,372 and $2,161 for the six months ended June 30, 2013 and 2012, respectively.