Note 5 - Goodwill and Other Intangible Assets - Amortizable Intangible Assets (Details) - USD ($) $ in Thousands	Sep. 02, 2017	Dec. 03, 2016
Net identifiable intangibles	$ 237,928	$ 204,892
Original cost	434,893	372,949
Accumulated amortization	(196,965)	(168,057)
Purchased Technology And Patents [Member]
Net identifiable intangibles	40,812	49,056
Original cost	72,563	70,504
Accumulated amortization	(31,751)	(21,448)
Customer Relationships [Member]
Net identifiable intangibles	176,131	134,918
Original cost	305,863	251,329
Accumulated amortization	(129,732)	(116,411)
Other Intangible Assets [Member]
Net identifiable intangibles	20,985	20,918
Original cost	56,467	51,116
Accumulated amortization	$ (35,482)	$ (30,198)