Restructuring and Related Charges (Details) - Restructuring accrual activity (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 28, 2013	Sep. 29, 2012
Restructuring and Related Charges (Details) - Restructuring accrual activity [Line Items]
Accrual at January 1, 2013	$ 732	$ 606
Charges to expense	532	395
Cash payments	(632)	(208)
Accrual at September 28, 2013	632	793
Lease Obligations [Member]
Restructuring and Related Charges (Details) - Restructuring accrual activity [Line Items]
Accrual at January 1, 2013	732	499
Charges to expense		418
Cash payments	(183)	(124)
Accrual at September 28, 2013	549	793
Severance And Other Termination Costs [Member]
Restructuring and Related Charges (Details) - Restructuring accrual activity [Line Items]
Accrual at January 1, 2013		57
Charges to expense	532	17
Cash payments	(449)	(74)
Accrual at September 28, 2013	83
Other Cost [Member]
Restructuring and Related Charges (Details) - Restructuring accrual activity [Line Items]
Accrual at January 1, 2013		50
Charges to expense		(40)
Cash payments		(10)
Accrual at September 28, 2013