Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 29, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jul. 01, 2012	Apr. 01, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 22,508	$ 29,068	$ 29,492	$ 22,245	$ 166,603	$ (38,778)	$ 42,390	$ 24,275	$ 103,313	$ 194,490	$ 114,345
Foreign currency translation, net of tax of $2.2 million, $0.0 million, and $0.0 million, respectively									(20,720)	(1,414)	(4,632)
Foreign currency hedging instruments, net of tax of $0.0 million, $1.6 million, and $0.0 million, respectively										2,467
Adjustments to pension and postretirement liability, net of tax of $14.0 million, $3.2 million, and $4.8 million, respectively									22,104	(8,909)	(9,158)
Other comprehensive income (loss), net of tax									1,384	(7,856)	(13,790)
Comprehensive income									$ 104,697	$ 186,634	$ 100,555