EMPLOYEES' RETIREMENT PLANS (Net Periodic Benefit Cost) (Details) - USD ($) $ in Thousands	12 Months Ended
	Aug. 31, 2020	Aug. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 335	$ 354
Interest cost	892	926
Special termination benefits	1,918	0
Settlements, curtailments and other	1,314	0
Total net periodic benefit cost	3,575	522
Net actuarial loss arising during measurement period	3,642	2,823
Amortization of net actuarial gain	(3,232)	0
Total recognized in other comprehensive income	410	2,823
Total recognized in net periodic benefit cost and other comprehensive income	3,985	3,345
Cost of Goods Sold
Defined Benefit Plan Disclosure [Line Items]
Service cost	335	354
Selling, General and Administrative Expenses
Defined Benefit Plan Disclosure [Line Items]
Expected administrative expenses	450	250
Interest cost	892	926
Expected return on Plan assets	$ (1,334)	$ (1,008)