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Note 2 - Acquisitions (Details Textual) - USD ($)
$ in Thousands
Feb. 03, 2020
May 17, 2019
Aug. 29, 2020
May 30, 2020
Nov. 30, 2019
Goodwill, Ending Balance     $ 1,306,398   $ 1,281,808
D.H.M Adhesives, Inc [Member]          
Payments to Acquire Businesses, Gross $ 9,500        
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High 8,100        
Goodwill, Ending Balance       $ 1,063  
Business Combination, Contingent Consideration, Liability, Total 5,000   $ 5,000   $ 0
Business Combination, Consideration Transferred, Total $ 14,500        
D.H.M Adhesives, Inc [Member] | Customer Relationships [Member]          
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill, Total       11,900  
Ramapo [Member]          
Payments to Acquire Businesses, Gross   $ 8,292      
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High   3,400      
Goodwill, Ending Balance       165  
Business Combination, Contingent Consideration, Liability, Total   2,654   767  
Business Combination, Consideration Transferred, Total   10,947      
Business Combination, Consideration Transferred, Receivables Settled   $ 2,166      
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets, Excluding Intangible Assets       4,148  
Ramapo [Member] | Customer Relationships [Member]          
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill, Total       $ 8,800