Insurance Claims and Settlements (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 03, 2011	Nov. 27, 2010	Nov. 28, 2009
Insurance Claim [Line Items]
Proceeds from insurance claims	$ 200	$ 557	$ 500
Insurance Claim - August 2011 [Member] | Engine Mobile Filtration [Member]
Insurance Claim [Line Items]
Insurance Deductible	250
Proceeds from insurance claims	200
Gain (Loss) on Disposition of Property	(250)
Insurance Claim - June 2009 [Member] | Industrial Environmental Filtration [Member]
Insurance Claim [Line Items]
Insurance Deductible			250
Proceeds from insurance claims		557	500
Gain (Loss) on Disposition of Property			(250)
Insurance Claim - Q2 2009 [Member]
Insurance Claim [Line Items]
Proceeds from insurance claims		654
Insurance Claim - Q2 2009 [Member] | Engine Mobile Filtration [Member]
Insurance Claim [Line Items]
Gain (Loss) on Disposition of Property			(178)
Insurance Claim - Q2 2009 [Member] | Industrial Environmental Filtration [Member]
Insurance Claim [Line Items]
Insurance Deductible			500
Gain (Loss) on Disposition of Property			$ 1,963