EMPLOYEES' RETIREMENT PLANS (Benefit Obligation and Fair Value of Plan Assets) (Details) - USD ($) $ in Thousands	12 Months Ended
	Aug. 31, 2020	Aug. 31, 2019
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation at beginning of year	$ 31,661	$ 0
Acquisition	0	26,336
Service cost	335	354
Interest cost	892	926
Curtailment loss	1,314	0
Special termination benefits	1,918	0
Amortization of net actuarial gain	1,280	4,883
Benefits paid	(1,270)	(838)
Benefit obligation at end of year	36,130	31,661
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of Plan assets at beginning of year	23,435	0
Acquisition	0	21,023
Actual return on Plan assets	2,248	2,887
Administrative expenses	(496)	(69)
Employer contributions	5,284	432
Benefits paid	(1,270)	(838)
Fair value of Plan assets at end of year	29,201	23,435
Funded status at end of year (net liability recognized in balance sheet as of August 31,)	(6,929)	(8,226)
Net actuarial loss	$ 3,234	$ 2,823