Restructuring Costs (Details) (USD $)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013	Sep. 29, 2012	Dec. 29, 2012	Dec. 31, 2011	Jan. 01, 2011
Restructuring Reserve [Roll Forward]
Restructuring Reserve	$ 721,000		$ 721,000		$ 850,000	$ 1,064,000	$ 2,242,000
Restructuring Charges	7,000	4,000	3,000	159,000	99,000	(50,000)
Reclassification Wtihin a Liability Account			0
Payments for Restructuring			(132,000)		(313,000)	(1,128,000)
Restructuring and Related Cost, Cost Incurred to Date			20,200,000
Employee Severance [Member]
Restructuring Reserve [Roll Forward]
Restructuring Reserve	0		0		158,000	160,000	293,000
Restructuring Charges			(1,000)		8,000	19,000
Reclassification Wtihin a Liability Account			(156,000)
Payments for Restructuring			(1,000)		(10,000)	(152,000)
Facility Closing [Member]
Restructuring Reserve [Roll Forward]
Restructuring Reserve	721,000		721,000		692,000	904,000	1,949,000
Restructuring Charges			4,000		91,000	(69,000)
Reclassification Wtihin a Liability Account			156,000
Payments for Restructuring			$ (131,000)		$ (303,000)	$ (976,000)