Restructuring (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended								3 Months Ended
	Jun. 28, 2014	Jun. 29, 2013	Jun. 28, 2014	Jun. 29, 2013	Jun. 28, 2014 Severance and related	Jun. 29, 2013 Severance and related	Jun. 28, 2014 Lease termination	Jun. 29, 2013 Lease termination	Jun. 28, 2014 Other	Jun. 29, 2013 Other	Jun. 29, 2013 2012 restructuring plan	Oct. 31, 2012 2012 restructuring plan employee
Restructuring Cost and Reserve [Line Items]
Approximate reduction in headcount												110
Recorded restructuring charges - less than	$ 3	$ 19	$ 14	$ 172							$ 100
Restructuring Reserve [Roll Forward]
Balance at beginning of the period			532	3,424	17	2,373	368	793	147	258
Restructuring Charges			10	437	0	101	1	91	9	245
Cash Payments			(328)	(2,886)	(8)	(2,295)	(304)	(403)	(16)	(188)
Adjustments to prior restructuring costs			4	(265)	(9)	(144)	13	(65)	0	(56)
Balance at the end of the period	$ 218	$ 710	$ 218	$ 710	$ 0	$ 35	$ 78	$ 416	$ 140	$ 259