Accrued Expenses and Other Current Liabilities (Product Warranty Rollforward) (Details) - USD ($)	12 Months Ended
	Jul. 31, 2022	Jul. 31, 2021
Changes in Product Warranty Liability
Balance at beginning of year	$ 17,600,000	$ 15,200,000
(Benefit from) provision for warranty obligations	(1,255,000)	4,360,000
Adjustments for changes in estimates	(2,500,000)	0
Charges incurred	(4,425,000)	(2,710,000)
Additions (in connection with acquisitions)	0	750,000
Balance at end of year	$ 9,420,000	$ 17,600,000