Goodwill and Purchased Intangible Assets - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 28, 2014	Mar. 29, 2013
Finite-Lived Intangible Assets [Line Items]
Amortization expenses	$ 1,221	$ 1,499
Customer relationships [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated economic lives for intangible assets	6 years
Customer relationships [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated economic lives for intangible assets	7 years
Tradename [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated economic lives for intangible assets	6 years
Tradename [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated economic lives for intangible assets	7 years
Intellectual property know-how [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated economic lives for intangible assets	7 years