Note 11 - Income Taxes - Deferred Income Tax Balances (Details) - USD ($) $ in Thousands	Nov. 28, 2020	Nov. 30, 2019
Pension and other post-retirement benefit plans	$ 1,417	$ 6,847
Employee benefit costs	24,538	21,468
Foreign tax credit carryforward	6,905	2,175
Tax loss carryforwards	31,495	26,427
Leases	7,133	0
Hedging activity	12,906	1,198
Other	36,521	32,626
Gross deferred tax assets	120,915	90,741
Less: valuation allowance	(21,843)	(14,986)
Total net deferred tax assets	99,072	75,755
Depreciation and amortization	(220,379)	(224,248)
Leases	(7,194)	0
Total deferred tax liability	(227,573)	(224,248)
Net deferred tax liability	$ (128,501)	$ (148,493)