Note 4 - Supplemental Financial Statement Information - Balance Sheet Information (Details) - USD ($)	Nov. 28, 2015	Nov. 29, 2014
Inventories
Raw materials	$ 121,545,000	$ 133,476,000
Finished goods	142,195,000	140,014,000
LIFO reserve	(15,236,000)	(22,200,000)
Total inventories	248,504,000	251,290,000
Other current assets
Other receivables	31,051,000	15,059,000
Prepaid income taxes	3,790,000	9,505,000
Prepaid taxes other than income taxes	$ 18,464,000	30,797,000
Deferred income taxes		20,924,000
Prepaid expenses	$ 12,232,000	12,547,000
Assets held for sale	3,138,000	4,273,000
Total other current assets	68,675,000	93,105,000
Property, plant and equipment
Land	68,008,000	65,367,000
Buildings and improvements	315,659,000	293,440,000
Machinery and equipment	683,988,000	710,180,000
Construction in progress	44,332,000	37,364,000
Total, at cost	1,111,987,000	1,106,351,000
Accumulated depreciation	(599,127,000)	(603,717,000)
Net property, plant and equipment	512,860,000	502,634,000
Other assets
Investments and company owned life insurance	9,641,000	10,950,000
Equity method investments	39,533,000	37,487,000
Cost Method Investments	1,666,000	1,671,000
Long-term deferred income taxes	55,663,000	40,142,000
Prepaid pension costs	4,273,000	7,588,000
Prepaid postretirement other than pension	15,755,000	12,054,000
Other long-term assets	34,613,000	39,434,000
Total other assets	161,144,000	149,326,000
Income taxes payable
Current income taxes payable	$ 8,970,000	10,961,000
Current deferred income taxes		2,800,000
Total income taxes payable	$ 8,970,000	13,761,000
Other accrued expenses
Taxes other than income taxes	16,909,000	19,427,000
Interest	5,027,000	4,548,000
Product liability	2,765,000	1,691,000
Accrued expenses	32,654,000	25,383,000
Total other accrued expenses	57,355,000	51,049,000
Other liabilities
Asset Retirement Obligations, Noncurrent	2,274,000	2,515,000
Long-term deferred income taxes	24,477,000	16,718,000
Long-term deferred compensation	5,675,000	5,635,000
Postretirement other than pension	2,902,000	3,146,000
Contingent consideration liabilities, continuing operations	10,854,000	196,000
Other long-term liabilities	23,090,000	13,565,000
Total other liabilities	$ 69,272,000	$ 41,775,000