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Note 2 - Acquisitions and Divestitures - Purchase Price Allocation of Assets and Liabilities Assumed of ProSpec (Details) - USD ($)
$ in Thousands
Dec. 03, 2016
Nov. 28, 2015
Nov. 29, 2014
Sep. 03, 2014
Goodwill $ 366,248 $ 354,204 $ 255,972  
ProSpec [Member]        
Current assets       $ 6,502
Property, plant and equipment       7,976
Goodwill       7,443
Current liabilities       (1,738)
Total purchase price       26,183
ProSpec [Member] | Customer Relationships [Member]        
Other intangibles       4,300
ProSpec [Member] | Developed Technology Rights [Member]        
Other intangibles       1,500
ProSpec [Member] | Trademarks and Trade Names [Member]        
Other intangibles       $ 200