Costs Associated with Exit or Disposal Activities - Liabilities and Expenses Related to Exit Activities (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 29, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Oct. 01, 2011	Jul. 02, 2011	Apr. 02, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Restructuring Reserve Disclosures [Abstract]
Balance at beginning of period				$ 1,048				$ 1,479	$ 1,048	$ 1,479
Charged to earnings	960	0	0	0	(49)	138	66	1,886	960	2,041	2,262
Cash paid									(1,041)	(2,472)
Balance at the end of period	$ 967				$ 1,048				$ 967	$ 1,048	$ 1,479