GOODWILL AND INTANGIBLE ASSETS (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended			3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended
	Mar. 29, 2014	Mar. 30, 2013	Dec. 28, 2013	Mar. 29, 2014 Customer Relationships	Dec. 28, 2013 Customer Relationships	Mar. 29, 2014 Proprietary Software and Database	Dec. 28, 2013 Proprietary Software and Database	Mar. 29, 2014 Patents and Proprietary Technology	Dec. 28, 2013 Patents and Proprietary Technology	Mar. 29, 2014 Non-compete Agreements	Dec. 28, 2013 Non-compete Agreements
Components of amortized intangible assets
Gross Carrying Amount	$ 240,775		$ 194,345	$ 223,739	$ 177,495	$ 3,949	$ 3,896	$ 11,463	$ 11,334	$ 1,624	$ 1,620
Accumulated Amortization	91,811		87,597	79,746	76,024	2,942	2,896	7,671	7,239	1,452	1,438
Weighted Average Life				13 years	13 years	6 years	6 years	8 years	8 years	6 years	6 years
Amortization expense for intangible assets	4,103	4,238
Estimated amortization expense
2014	18,211
2015	17,923
2016	17,350
2017	17,302
2018	$ 15,616