Restructuring (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended	3 Months Ended		3 Months Ended
Jun. 29, 2013	Jun. 30, 2012	Jun. 29, 2013	Jun. 30, 2012	Jun. 29, 2013 Severance and related	Jun. 30, 2012 Severance and related	Jun. 29, 2013 Lease termination	Jun. 30, 2012 Lease termination	Jun. 29, 2013 Other	Jun. 30, 2012 Other	Jun. 29, 2013 2012 restructuring plan	Oct. 31, 2012 2012 restructuring plan employee	Jun. 30, 2012 2011 restructuring plan
Restructuring Cost and Reserve [Line Items]
Approximate reduction in headcount												110
Recorded restructuring charges	$ 19	$ 87	$ 172	$ 643							$ 100		$ 100
Restructuring Reserve [Roll Forward]
Balance at beginning of the period			3,424	1,569	2,373	1,543	793	26	258	0
Restructuring charges			437	761	101	296	91	0	245	465
Cash payments			(2,886)	(2,212)	(2,295)	(1,735)	(403)	(12)	(188)	(465)
Adjustments to prior restructuring costs			(265)	(118)	(144)	(104)	(65)	(14)	(56)	0
Balance at the end of the period	$ 710	$ 0	$ 710	$ 0	$ 35	$ 0	$ 416	$ 0	$ 259	$ 0

Discloses the amount charged against the accrued restructuring reserves, or earnings if not previously accrued, during the period for the specified type of restructuring cost.

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Amount charged against earnings in the period for incurred and estimated costs associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, excluding asset retirement obligations.

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- Definition

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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- Definition

Amount of cash paid in the period to fully or partially settle a specified, previously accrued type of restructuring cost.

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