Note 5 - Goodwill and Other Intangible Assets - Amortizable Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Nov. 30, 2019	Dec. 01, 2018
Original cost	$ 1,113,925	$ 1,172,384
Accumulated amortization	(315,006)	(264,726)
Net identifiable intangibles	$ 798,919	$ 907,658
Weighted-average useful lives (Year)	17 years	17 years
Purchased Technology And Patents [Member]
Original cost	$ 109,967	$ 118,930
Accumulated amortization	(43,351)	(41,503)
Net identifiable intangibles	$ 66,616	$ 77,427
Weighted-average useful lives (Year)	13 years	12 years
Customer Relationships [Member]
Original cost	$ 913,968	$ 953,929
Accumulated amortization	(223,563)	(175,318)
Net identifiable intangibles	$ 690,405	$ 778,611
Weighted-average useful lives (Year)	17 years	17 years
Trade Names [Member]
Original cost	$ 62,537	$ 65,975
Accumulated amortization	(24,819)	(21,573)
Net identifiable intangibles	$ 37,718	$ 44,402
Weighted-average useful lives (Year)	14 years	14 years
Other Intangible Assets [Member]
Original cost	$ 27,453	$ 33,550
Accumulated amortization	(23,273)	(26,332)
Net identifiable intangibles	$ 4,180	$ 7,218
Weighted-average useful lives (Year)	10 years	9 years