Acquisitions (Details) (USD $)	12 Months Ended				12 Months Ended
	Dec. 29, 2012	Dec. 29, 2012 m-clean papertech holding AB (M-Clean) [Member]	Dec. 31, 2011 m-clean papertech holding AB (M-Clean) [Member]	May 27, 2011 m-clean papertech holding AB (M-Clean) [Member]	Jan. 01, 2011 A Canadian-Based Supplier of Products and A European Supplier of Products [Member]	Dec. 29, 2012 A Canadian-Based Supplier of Products and A European Supplier of Products [Member]	Dec. 31, 2011 A Canadian-Based Supplier of Products and A European Supplier of Products [Member]	Jan. 01, 2011 Prior 2010 Acquisitions [Member]
Business Acquisition [Line Items]
Aggregate purchase price				$ 15,966,000	$ 8,286,000
Cash acquired				910,000	4,450,000
Debt assumed				517,000
Acquisition transaction costs			249,000		303,000
Identifiable intangible assets acquired				5,777,000	1,313,000
Weighted average useful life of acquired intangible assets	13 years	8 years
Total goodwill acquired				9,641,000	2,574,000
Cash paid to acquire entity					7,658,000	53,000	500,000	2,592,000
Tax deductible goodwill acquired					$ 740,000