Note 5 - Goodwill and Other Intangible Assets - Amortizable Intangible Assets (Details) - USD ($) $ in Thousands	Aug. 29, 2020	Nov. 30, 2019
Original cost	$ 1,122,478	$ 1,113,925
Accumulated amortization	(351,055)	(315,006)
Net identifiable intangibles	771,423	798,919
Purchased Technology And Patents [Member]
Original cost	113,820	109,967
Accumulated amortization	(51,381)	(43,351)
Net identifiable intangibles	62,439	66,616
Customer Relationships [Member]
Original cost	933,982	913,968
Accumulated amortization	(266,737)	(223,563)
Net identifiable intangibles	667,245	690,405
Trade Names [Member]
Original cost	63,266	62,537
Accumulated amortization	(28,384)	(24,819)
Net identifiable intangibles	34,882	37,718
Other Intangible Assets [Member]
Original cost	11,410	27,453
Accumulated amortization	(4,553)	(23,273)
Net identifiable intangibles	$ 6,857	$ 4,180