Restructuring Costs (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2012	Jul. 02, 2011	Jun. 30, 2012	Jul. 02, 2011	Dec. 31, 2011	Jan. 01, 2011	Jan. 02, 2010
Restructuring Reserve [Roll Forward]
Restructuring Reserve	$ 1,007		$ 1,007		$ 1,064	$ 2,242	$ 4,526
Restructuring Charges	150	(20)	155	(97)	(50)	(261)
Payments for Restructuring			(212)		(1,128)	(2,023)
Employee Severance [Member]
Restructuring Reserve [Roll Forward]
Restructuring Reserve	158		158		160	293	590
Restructuring Charges			8		19	(45)
Payments for Restructuring			(10)		(152)	(252)
Facility Closing [Member]
Restructuring Reserve [Roll Forward]
Restructuring Reserve	849		849		904	1,949	3,936
Restructuring Charges			147		(69)	(216)
Payments for Restructuring			$ (202)		$ (976)	$ (1,771)