Schedule of Changes In Allowance For Doubtful Accounts (Details) - USD ($) $ in Thousands		12 Months Ended
		Jul. 31, 2022	Jul. 31, 2021	Jul. 31, 2020
Accounting Policies [Abstract]
Allowance for doubtful accounts, Balance at beginning of year		$ 4,438	$ 6,085	$ 5,444
Allowance for doubtful accounts, Additions charged to costs and expenses		2,330	1,782	3,109
Allowance for doubtful accounts, Deductions	[1]	(886)	(3,429)	(2,468)
Allowance for doubtful accounts, Balance at end of year		$ 5,882	$ 4,438	$ 6,085

[1] Primarily uncollectible accounts written off, net of recoveries.