Schedule II - Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Aug. 31, 2022	Aug. 31, 2021	Aug. 31, 2020
Allowance for credit losses / doubtful accounts
Valuation And Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	$ 1,566	$ 1,593	$ 1,569
Charged to Cost and Expense	40	0	66
Deductions	(56)	(27)	(42)
Balance at End of Period	1,550	1,566	1,593
Deferred tax valuation allowance
Valuation And Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	14,522	16,933	16,436
Charged to Cost and Expense	2,326	482	1,293
Deductions	(1,506)	(2,893)	(796)
Balance at End of Period	$ 15,342	$ 14,522	$ 16,933