Note 9 - Components of Net Periodic Cost (Benefit) Related to Pension and Other Postretirement Benefit Plans - Components of Net Periodic Benefit Cost (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 01, 2018	Sep. 02, 2017	Sep. 01, 2018	Sep. 02, 2017
Pension Plan [Member] | UNITED STATES
Service cost	$ 14	$ 27	$ 42	$ 83
Interest cost	3,419	3,603	10,257	10,809
Expected return on assets	(6,541)	(6,365)	(19,623)	(19,093)
Prior service cost	7	8	21	22
Actuarial loss	1,476	1,308	4,428	3,922
Net periodic (benefit) cost	(1,625)	(1,419)	(4,875)	(4,257)
Pension Plan [Member] | Foreign Plan [Member]
Service cost	566	546	1,746	1,566
Interest cost	1,141	1,199	3,526	3,490
Expected return on assets	(2,710)	(2,510)	(8,385)	(7,301)
Prior service cost	(1)	(1)	(3)	(3)
Actuarial loss	710	893	2,191	2,581
Net periodic (benefit) cost	(294)	127	(925)	333
Other Postretirement Benefits Plan [Member]
Service cost	43	52	129	156
Interest cost	371	399	1,113	1,195
Expected return on assets	(1,724)	(1,447)	(5,172)	(4,341)
Prior service cost
Actuarial loss	15	251	45	757
Net periodic (benefit) cost	$ (1,295)	$ (745)	$ (3,885)	$ (2,233)