Note 7 - Components of Net Periodic Benefit Cost (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Aug. 27, 2016	Aug. 29, 2015	Aug. 27, 2016	Aug. 29, 2015
United States Pension Plan of US Entity [Member]
Service cost	$ 27	$ 27	$ 81	$ 80
Interest cost	3,768	4,082	11,303	12,242
Expected return on assets	(6,078)	(6,421)	(18,232)	(19,262)
Prior service cost	7	7	21	22
Actuarial loss	1,292	1,407	3,878	4,221
Net periodic (benefit) cost	(984)	(898)	(2,949)	(2,697)
Foreign Pension Plan [Member]
Service cost	519	467	1,480	1,447
Interest cost	1,343	1,471	4,076	4,448
Expected return on assets	(2,435)	(2,590)	(7,400)	(7,830)
Prior service cost	(1)	(1)	(3)	(3)
Actuarial loss	788	775	2,293	2,387
Net periodic (benefit) cost	214	122	446	449
Other Postretirement Benefit Plan [Member]
Service cost	84	112	252	336
Interest cost	479	510	1,439	1,531
Expected return on assets	(1,341)	(1,377)	(4,025)	(4,132)
Prior service cost	(10)	(626)	(30)	(1,878)
Actuarial loss	532	607	1,596	1,823
Net periodic (benefit) cost	$ (256)	$ (774)	$ (768)	$ (2,320)