GOODWILL AND INTANGIBLE ASSETS (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended			9 Months Ended	12 Months Ended	9 Months Ended	12 Months Ended	9 Months Ended	12 Months Ended	9 Months Ended	12 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013	Sep. 29, 2012	Dec. 29, 2012	Sep. 28, 2013 Customer Relationships	Dec. 29, 2012 Customer Relationships	Sep. 28, 2013 Proprietary Software and Database	Dec. 29, 2012 Proprietary Software and Database	Sep. 28, 2013 Patents and Proprietary Technology	Dec. 29, 2012 Patents and Proprietary Technology	Sep. 28, 2013 Non-compete Agreements	Dec. 29, 2012 Non-compete Agreements
Components of amortized intangible assets
Gross Carrying Amount	$ 190,994		$ 190,994		$ 185,389	$ 175,273	$ 170,556	$ 3,958	$ 3,073	$ 9,961	$ 9,953	$ 1,802	$ 1,807
Accumulated Amortization	84,254		84,254		72,811	73,081	62,957	2,875	2,795	6,691	5,517	1,607	1,542
Weighted Average Life						13 years	13 years	6 years	6 years	8 years	8 years	6 years	6 years
Amortization expense for intangible assets	3,750	3,582	11,446	10,751
Estimated amortization expense
2013	15,322		15,322
2014	15,328		15,328
2015	14,442		14,442
2016	13,884		13,884
2017	$ 13,845		$ 13,845