Note 5 - Goodwill and Other Intangible Assets - Amortizable Intangible Assets (Details) - USD ($) $ in Thousands	Feb. 29, 2020	Nov. 30, 2019
Original cost	$ 1,108,712	$ 1,113,925
Accumulated amortization	(312,870)	(315,006)
Net identifiable intangibles	795,842	798,919
Purchased Technology And Patents [Member]
Original cost	110,212	109,967
Accumulated amortization	(45,951)	(43,351)
Net identifiable intangibles	64,261	66,616
Customer Relationships [Member]
Original cost	924,540	913,968
Accumulated amortization	(236,848)	(223,563)
Net identifiable intangibles	687,692	690,405
Trade Names [Member]
Original cost	62,539	62,537
Accumulated amortization	(25,964)	(24,819)
Net identifiable intangibles	36,575	37,718
Other Intangible Assets [Member]
Original cost	11,421	27,453
Accumulated amortization	(4,107)	(23,273)
Net identifiable intangibles	$ 7,314	$ 4,180