EMPLOYEES' RETIREMENT PLANS (Benefit Obligation and Fair Value of Plan Assets) (Details) - USD ($) $ in Thousands	12 Months Ended
	Aug. 31, 2021	Aug. 31, 2020
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation at beginning of year	$ 36,130	$ 31,661
Service cost	0	335
Interest cost	724	892
Curtailment loss	0	1,314
Special termination benefits	0	1,918
Amortization of net actuarial gain	(1,557)	1,280
Benefits paid	(1,610)	(1,270)
Benefit obligation at end of year	33,687	36,130
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of Plan assets at beginning of year	29,201	23,435
Actual return on Plan assets	4,042	2,248
Administrative expenses	(52)	(496)
Employer contributions	2,545	5,284
Benefits paid	(1,610)	(1,270)
Fair value of Plan assets at end of year	34,126	29,201
Funded status at end of year (net asset (liability) recognized in the consolidated balance sheets as of August 31,)	439	(6,929)
Net actuarial (gain) loss	$ (1,110)	$ 3,234