Segment Information - Net Income Reconciliation (Detail) - USD ($) $ in Thousands	3 Months Ended
	Oct. 31, 2023	Oct. 31, 2022
Segment Reconciliation [Abstract]
Total profit from reportable segments	$ 66,641	$ 57,903
Unallocated amounts:
Administrative costs	(6,911)	(6,517)
Investment and other income (expense)	438	(157)
Interest expense	(766)	(894)
Income before income taxes	$ 59,402	$ 50,335