Note 4 - Supplemental Financial Statement Information - Balance Sheet Information (Details) - USD ($) $ in Thousands	Dec. 03, 2016	Nov. 28, 2015	Nov. 29, 2014
Inventories
Raw materials	$ 116,200	$ 121,545
Finished goods	142,397	142,195
LIFO reserve	(11,198)	(15,236)
Total inventories	247,399	248,504
Other current assets
Other receivables	24,253	31,051
Prepaid income taxes	12,142	3,790
Prepaid taxes other than income taxes	18,011	18,464
Prepaid expenses	14,767	12,232
Assets held for sale	1,306	3,138
Total other current assets	70,479	68,675
Property, plant and equipment
Land	65,771	68,008
Buildings and improvements	317,636	315,659
Machinery and equipment	659,181	683,988
Construction in progress	50,553	44,332
Total, at cost	1,093,141	1,111,987
Accumulated depreciation	(577,866)	(599,127)
Net property, plant and equipment	515,275	512,860	$ 502,634
Other assets
Investments and company owned life insurance	8,178	9,641
Equity method investments	45,732	39,533
Cost Method Investments	1,666	1,666
Long-term deferred income taxes	46,174	55,663
Prepaid pension costs	31	4,273
Prepaid postretirement other than pension	27,093	15,755
Other long-term assets	31,245	34,613
Total other assets	160,119	161,144
Other accrued expenses
Taxes other than income taxes	14,127	16,909
Interest	5,263	5,027
Product liability	1,648	2,765
Accrued expenses	29,901	32,654
Total other accrued expenses	50,939	57,355
Other liabilities
Asset Retirement Obligations, Noncurrent	2,264	2,274
Long-term deferred income taxes	26,336	24,477
Long-term deferred compensation	5,469	5,675
Postretirement other than pension	2,968	2,902
Contingent consideration liabilities	4,720	10,854
Other long-term liabilities	20,417	23,090
Total other liabilities	$ 62,174	$ 69,272