Restructuring Costs (Details) (USD $)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 29, 2013	Jun. 30, 2012	Jun. 29, 2013	Jun. 30, 2012	Dec. 29, 2012	Dec. 31, 2011	Jan. 01, 2011
Restructuring Reserve [Roll Forward]
Restructuring Reserve	$ 764,000		$ 764,000		$ 850,000	$ 1,064,000	$ 2,242,000
Restructuring Charges	(1,000)	150,000	(4,000)	155,000	99,000	(50,000)
Payments for Restructuring			(82,000)		(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	156,000		156,000		158,000	160,000	293,000
Restructuring Charges			(1,000)		8,000	19,000
Payments for Restructuring			(1,000)		(10,000)	(152,000)
Facility Closing [Member]
Restructuring Reserve [Roll Forward]
Restructuring Reserve	608,000		608,000		692,000	904,000	1,949,000
Restructuring Charges			(3,000)		91,000	(69,000)
Payments for Restructuring			$ (81,000)		$ (303,000)	$ (976,000)