Reconciliation Of Total Segment Profit To Operating Income (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 29, 2012	Oct. 01, 2011	Sep. 29, 2012	Oct. 01, 2011
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total segment profit	$ 46,049	$ 40,987	$ 135,924	$ 151,903
Amortization of intangibles	(2,389)	(2,505)	(7,259)	(7,763)
Unallocated general and administrative expenses	(16,526)	(11,649)	(43,163)	(38,987)
Operating income	27,134	26,833	85,502	105,153
Interest income	(83)	(58)	(183)	(105)
Interest expense	43	20	171	755
Other (income) expense, net	1,481	315	648	(1,643)
Income before income taxes and equity in net income of affiliates	$ 25,693	$ 26,556	$ 84,866	$ 106,146