Supplementary Balance Sheet Information (Components Of Accounts Payable And Accrued Liabilities) (Details) - USD ($) $ in Thousands	Oct. 31, 2023	Jul. 31, 2023	Oct. 31, 2022
Balance Sheet Related Disclosures [Abstract]
Trade payables	$ 161,581	$ 148,521	$ 162,366
Deferred revenue	872,418	572,602	787,514
Accrued salaries, wages and deferred compensation	57,340	60,466	44,008
Accrued benefits	42,880	37,798	35,491
Deposits	33,733	38,908	41,239
Operating Lease, Liability, Current	38,332	36,904	35,331
Other liabilities	70,241	82,822	84,573
Total accounts payable and accrued liabilities	$ 1,276,525	$ 978,021	$ 1,190,522