Segment Information - Net Income Reconciliation (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Apr. 30, 2023	Apr. 30, 2022	Apr. 30, 2023	Apr. 30, 2022
Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Abstract]
Segment profit	$ 66,291	$ 61,071	$ 177,827	$ 160,824
Unallocated amounts:
Administrative costs	(7,060)	(8,182)	(18,429)	(20,728)
Gain (Loss) on Disposition of Business	3,770	0	3,770	0
Investment and other income (expense)	785	(1,308)	1,596	(1,343)
Interest expense	(753)	(329)	(2,886)	(763)
Income before income taxes	$ 63,033	$ 51,252	$ 161,878	$ 137,990