Fair Value Measurement (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jul. 01, 2012	Jul. 03, 2011	Jul. 01, 2012	Jul. 03, 2011
Table reconciles intangible assets, other than goodwill
Beginning balance			$ 29,886
2012 first half amortization expense	700	700	1,500	1,300
Ending balance	31,911		31,911
Estimated Fair Values [Member]
Table reconciles intangible assets, other than goodwill
Beginning balance			29,886
2012 addition, Note C, - Acquisitions	3,570		3,570
2012 first half amortization expense			(1,545)
Ending balance	$ 31,911		$ 31,911