Segment Information - Segment Operating Profit to Income Before Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Apr. 30, 2026	Apr. 30, 2025	Apr. 30, 2026	Apr. 30, 2025
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating Income (Loss)	$ 73,206	$ 67,190	$ 203,368	$ 177,346
Investment and other income (expense)	1,431	(509)	3,948	2,850
Interest expense	(1,269)	(936)	(3,467)	(3,604)
Income before income taxes	73,368	65,745	203,849	176,592
Operating Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating Income (Loss)	90,200	74,642	237,968	200,020
Segment Reporting, Reconciling Item, Corporate Nonsegment
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Administrative Costs	(16,994)	(7,452)	(34,600)	(22,674)
Investment and other income (expense)	1,431	(509)	3,948	2,850
Interest expense	$ (1,269)	$ (936)	$ (3,467)	$ (3,604)