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Restructuring - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
	Jun. 29, 2013	Jun. 29, 2013
Restructuring And Related Activities [Abstract]
Charges related primarily to employee redundancy costs	$ 2.0	$ 2.0

- Definition

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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