Note 12 - Income Taxes - Deferred Income Tax Balances (Details) - USD ($) $ in Thousands	Nov. 30, 2019	Dec. 01, 2018
Employee benefit costs	$ 32,621	$ 19,617
Deferred Tax Assets, Tax Credit Carryforwards, Foreign	2,175	1,809
Tax loss carryforwards	26,427	27,532
Other	29,518	20,865
Gross deferred tax assets	90,741	69,823
Less: valuation allowance	(14,986)	(14,129)
Total net deferred tax assets	75,755	55,694
Depreciation and amortization	(224,248)	(242,877)
Total deferred tax liability	(224,248)	(242,877)
Net deferred tax liability	$ (148,493)	$ (187,183)