INCOME TAX (Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands	Aug. 31, 2021	Aug. 31, 2020
Deferred tax assets:
Net operating losses and credits	$ 291,145	$ 283,416
Deferred compensation and employee benefits	64,693	32,293
Reserves and other accrued expenses	13,846	30,371
ROU operating lease liabilities	28,915	29,619
Other	3,817	3,315
Total deferred tax assets	402,416	379,014
Valuation allowance for deferred tax assets	(278,099)	(281,849)
Deferred tax assets, net	124,317	97,165
Deferred tax liabilities:
Property, plant and equipment	(180,925)	(185,595)
ROU operating lease assets	(26,950)	(28,201)
Other	(8,940)	(2,420)
Net deferred tax liabilities	(216,815)	(216,216)
Total deferred tax liabilities	$ (92,498)	$ (119,051)