Property, Plant and Equipment (Details 1) (USD $) In Thousands, unless otherwise specified				12 Months Ended
	Dec. 03, 2011	Nov. 27, 2010	Nov. 28, 2009	Dec. 03, 2011 Additions to Property, Plant and Equipment Still Included in Accounts Payable and Accrued Expenses at Period End [Member]	Nov. 27, 2010 Additions to Property, Plant and Equipment Still Included in Accounts Payable and Accrued Expenses at Period End [Member]	Dec. 03, 2011 Additions to Property, Plant and Equipment by Incurring Additional Long Term Debt [Member]	Nov. 27, 2010 Additions to Property, Plant and Equipment by Incurring Additional Long Term Debt [Member]	Dec. 03, 2011 Land [Member]	Nov. 27, 2010 Land [Member]	Dec. 03, 2011 Building and Building Improvements [Member]	Nov. 27, 2010 Building and Building Improvements [Member]
Property, Plant and Equipment [Line Items]
Land	$ 8,763	$ 8,669
Buildings and building fixtures	99,778	95,452
Machinery and equipment	358,763	324,757
Construction in process	10,799	27,669
Property, plant and equipment, at cost, gross	478,103	456,547
Accumulated depreciation	(293,111)	(275,372)
Property, plant and equipment, at cost, less accumulated depreciation	184,992	181,175	188,091
Assets held for sale	2,000	2,000						398	398	1,602	1,602
Capital expenditures incurred but not yet paid				$ 2,315	$ 645	$ 14	$ 437