Segment Information - Net Income Reconciliation (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 31, 2024	Jan. 31, 2023	Jan. 31, 2024	Jan. 31, 2023
Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Abstract]
Segment profit	$ 58,949	$ 53,633	$ 125,590	$ 111,536
Unallocated amounts:
Administrative costs	(5,023)	(4,852)	(11,934)	(11,369)
Investment and other income	2,684	968	3,122	811
Interest expense	(790)	(1,239)	(1,556)	(2,133)
Income before income taxes	$ 55,820	$ 48,510	$ 115,222	$ 98,845