Inventories - Schedule of Major Classifications of Inventories (Details) - USD ($) $ in Thousands	Jan. 31, 2026	Jul. 31, 2025
Inventory [Line Items]
Work in process	$ 319,177	$ 269,279
Raw materials	468,521	409,411
Chassis	491,692	438,079
Subtotal	1,739,940	1,500,608
Excess of FIFO costs over LIFO costs	(151,916)	(148,812)
Total inventories, net	1,588,024	1,351,796
Recreational vehicles
Inventory [Line Items]
Finished goods	308,799	256,239
Other
Inventory [Line Items]
Finished goods	$ 151,751	$ 127,600