Costs Associated with Exit and Restructuring Activities - Liabilities and Expenses Related to Exit and Restructuring Activities (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended		12 Months Ended	21 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013	Sep. 29, 2012	Dec. 31, 2012	Sep. 28, 2013
Restructuring And Related Activities [Abstract]
Balance at beginning of period			$ 967	$ 1,048	$ 1,048	$ 1,048
Charged to earnings	519	0	3,515	0	960	4,475
Cash paid			(3,962)	(872)
Balance at the end of period	$ 520	$ 176	$ 520	$ 176	$ 967	$ 520