Supplementary Balance Sheet Information (Components Of Accounts Payable And Accrued Liabilities) (Details) - USD ($) $ in Thousands	Jul. 31, 2023	Jul. 31, 2022
Trade payables	$ 148,521	$ 151,263
Deferred Revenue, Current	572,602	511,306
Accrued salaries, wages and deferred compensation	38,908	64,570
Accrued benefits	60,466	45,202
Deposits	37,798	37,731
Current operating lease liability	36,904	34,218
Other accruals	82,822	98,540
Total accounts payable and accrued liabilities	$ 978,021	$ 942,830