Insurance Claims and Settlements (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 01, 2012	Dec. 03, 2011	Nov. 27, 2010	Dec. 03, 2011 Insurance Claim - August 2011 [Member] Engine Mobile Filtration [Member]	Nov. 27, 2010 Insurance Claim - June 2009 [Member] Industrial Environmental Filtration [Member]	Nov. 28, 2009 Insurance Claim - June 2009 [Member] Industrial Environmental Filtration [Member]
Insurance Claim [Line Items]
Insurance Deductible				$ 250
Proceeds from insurance claims	0	200	557	200	557	500
Gain (Loss) on Disposition of Property				$ (250)		$ (250)