Restructuring Reserve Rollforward (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
Sep. 27, 2014	Sep. 28, 2013
Summary of components of accrued liability with respect to Company's business restructuring activities
Beginning balance	$ 8,457	$ 6,278
Additions	10,615	1,746
Cash payments	(12,277)	(6,386)
Adjustments	(391)	(71)
Ending balance	$ 6,404	$ 1,567

Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation.

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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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Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.

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Amount of any reversal and other adjustment made during the period to the amount of a previously accrued liability for a specified type of restructuring cost, excluding adjustments for costs incurred during the period, costs settled during the period, and foreign currency translation adjustments.

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