Amortization Expense of Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 28, 2013	Jun. 29, 2012	Jun. 28, 2013	Jun. 29, 2012
Finite Lived Intangible Assets Amortization Expense [Line Items]
Amortization	$ 2,960	$ 1,454	$ 6,447	$ 2,907
Cost of Sales
Finite Lived Intangible Assets Amortization Expense [Line Items]
Amortization	1,343	791	2,594	1,582
Operating Expense
Finite Lived Intangible Assets Amortization Expense [Line Items]
Amortization	$ 1,617	$ 663	$ 3,853	$ 1,325