SCHEDULE II — VALUATION AND QUALIFYING ACCOUNTS AND RESERVES (Details) - USD ($) $ in Thousands		12 Months Ended
		Aug. 31, 2020	Aug. 31, 2019	Aug. 31, 2018
Allowance for doubtful accounts
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period		$ 8,403	$ 4,489	$ 4,146
Additions, Charged to Cost and Expense		1,079	1,820	2,645
Additions, Charged to Other Accounts	[1]	2,220	4,718	(165)
Deductions, Charged to Cost and Expense		0	(75)	(136)
Deductions, Charged to Other Accounts	[2]	(2,105)	(2,549)	(2,001)
Balance at End of Period		9,597	8,403	4,489
Deferred tax valuation allowance
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period		283,560	268,554	273,991
Additions, Charged to Cost and Expense		4,733	22,220	31,471
Additions, Charged to Other Accounts
Deductions, Charged to Cost and Expense		(6,444)	(7,214)	(36,908)
Deductions, Charged to Other Accounts
Balance at End of Period		$ 281,849	283,560	268,554
Before Reclassification | Allowance for doubtful accounts
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period			$ 4,489
Balance at End of Period				$ 4,489

[1] Recoveries and translation adjustments.

[2] Uncollectable accounts charged to the allowance.