INTANGIBLE ASSETS AND GOODWILL - Summary of Components of Net Balance (Detail) - USD ($) $ in Thousands	Jul. 31, 2021	Jul. 31, 2020	Jul. 31, 2019
Goodwill [Line Items]
Goodwill	$ 1,590,656	$ 1,503,942
Accumulated impairment charges	(27,401)	(27,401)
Net balance	1,563,255	1,476,541	$ 1,358,032
Other
Goodwill [Line Items]
Goodwill	122,708	104,826
Accumulated impairment charges	0	0
Net balance	122,708	104,826	42,871
North American Towables | Operating Segments
Goodwill [Line Items]
Goodwill	355,124	343,935
Accumulated impairment charges	(10,149)	(10,149)
Net balance	344,975	333,786	334,822
North American Motorized | Operating Segments
Goodwill [Line Items]
Goodwill	71,127	17,252
Accumulated impairment charges	(17,252)	(17,252)
Net balance	53,875	0	0
European | Operating Segments
Goodwill [Line Items]
Goodwill	1,041,697	1,037,929
Accumulated impairment charges	0	0
Net balance	$ 1,041,697	$ 1,037,929	$ 980,339