Property, Plant and Equipment (Details 1) (USD $) In Thousands, unless otherwise specified				12 Months Ended
	Dec. 01, 2012	Dec. 03, 2011	Nov. 27, 2010	Dec. 01, 2012 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 Still Included in Accounts Payable and Accrued Expenses at Period End [Member]	Dec. 01, 2012 Additions to Property, Plant and Equipment Acquired Under Capitalized Leases [Member]	Dec. 03, 2011 Additions to Property, Plant and Equipment Acquired Under Capitalized Leases [Member]	Dec. 01, 2012 Land [Member]	Dec. 03, 2011 Land [Member]	Dec. 01, 2012 Building and Building Improvements [Member]	Dec. 03, 2011 Building and Building Improvements [Member]
Property, Plant and Equipment [Line Items]
Land	$ 9,326	$ 8,763
Buildings and building fixtures	107,857	99,778
Machinery and equipment	372,358	358,763
Construction in process	20,578	10,799
Property, plant and equipment, at cost, gross	510,119	478,103
Accumulated depreciation	(315,018)	(293,111)
Property, plant and equipment, at cost, less accumulated depreciation	195,101	184,992	181,175
Assets held for sale	2,000	2,000						398	398	1,602	1,602
Capital expenditures incurred but not yet paid				$ 1,668	$ 2,315	$ 826	$ 14