Note 10 - Pension and Postretirement Benefits - Changes in the Level 3 Plan Assets of Pension and Other Postretirement Plans (Details) $ in Thousands	12 Months Ended
	Nov. 28, 2015 USD ($)
United States Pension Plan of US Entity [Member] | Fair Value, Inputs, Level 3 [Member] | Fixed Income Funds [Member]
Level 3 balance at beginning of year	$ 407
Purchases, sales, issuances and settlements, net	(55)
Level 3 balance at end of year	352
United States Pension Plan of US Entity [Member] | Fair Value, Inputs, Level 3 [Member]
Level 3 balance at beginning of year	407
Level 3 balance at end of year	352
United States Pension Plan of US Entity [Member] | Fixed Income Funds [Member]
Level 3 balance at beginning of year	149,639
Level 3 balance at end of year	130,386
United States Pension Plan of US Entity [Member]
Level 3 balance at beginning of year	384,335
Level 3 balance at end of year	$ 336,461
Currency change effect
Foreign Pension Plan [Member] | Fair Value, Inputs, Level 3 [Member] | Fixed Income Funds [Member]
Level 3 balance at beginning of year	$ 582
Purchases, sales, issuances and settlements, net
Level 3 balance at end of year	$ 530
Net transfers into / (out of) level 3	28
Net gains	9
Currency change effect	(89)
Foreign Pension Plan [Member] | Fair Value, Inputs, Level 3 [Member] | Real Estate [Member]
Level 3 balance at beginning of year	2,160
Purchases, sales, issuances and settlements, net	$ (2,388)
Level 3 balance at end of year
Net transfers into / (out of) level 3	$ (12)
Net gains	282
Currency change effect	(42)
Foreign Pension Plan [Member] | Fair Value, Inputs, Level 3 [Member]
Level 3 balance at beginning of year	2,742
Purchases, sales, issuances and settlements, net	(2,388)
Level 3 balance at end of year	530
Net transfers into / (out of) level 3	16
Net gains	291
Currency change effect	(131)
Foreign Pension Plan [Member] | Fixed Income Funds [Member]
Level 3 balance at beginning of year	87,934
Level 3 balance at end of year	84,697
Foreign Pension Plan [Member] | Real Estate [Member]
Level 3 balance at beginning of year	2,160
Foreign Pension Plan [Member]
Level 3 balance at beginning of year	188,424
Level 3 balance at end of year	172,241
Currency change effect	17,552
Other Postretirement Benefit Plan [Member] | Fair Value, Inputs, Level 3 [Member] | Insurance [Member]
Level 3 balance at beginning of year	61,980
Purchases, sales, issuances and settlements, net	(462)
Level 3 balance at end of year	62,299
Net transfers into / (out of) level 3	(701)
Net gains	1,482
Other Postretirement Benefit Plan [Member] | Fair Value, Inputs, Level 3 [Member]
Level 3 balance at beginning of year	61,980
Level 3 balance at end of year	62,299
Other Postretirement Benefit Plan [Member] | Insurance [Member]
Level 3 balance at beginning of year	61,980
Level 3 balance at end of year	62,299
Other Postretirement Benefit Plan [Member]
Level 3 balance at beginning of year	63,076
Level 3 balance at end of year	$ 62,585
Currency change effect