Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Aug. 31, 2022	Aug. 31, 2021	Aug. 31, 2020
Allowance For Doubtful Accounts [Member]
Valuation And Qualifying Accounts Disclosure [Line Items]
Balance at beginning of period	$ 3,422	$ 2,780	$ 2,635
Charges to costs and expenses	903	771	589
Charged to other accounts	0	0	0
Deductions	207	129	444
Balance at end of period	4,118	3,422	2,780
Deferred Tax Asset Valuation Allowance [Member]
Valuation And Qualifying Accounts Disclosure [Line Items]
Balance at beginning of period	1,091	3,218	3,759
Charges to costs and expenses	0	206	83
Charged to other accounts	(112)	0	0
Deductions	0	2,333	624
Balance at end of period	$ 1,203	$ 1,091	$ 3,218