BUSINESS SEGMENTS - Schedule of Segment Reporting Information, by Segment Balance Sheet Item (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2021	Jul. 31, 2020	Jul. 31, 2019
Segment Reporting Information [Line Items]
Total assets	$ 6,654,088	$ 5,771,460
Depreciation and Intangible amortization expense	230,581	196,167	$ 148,777
Capital acquisitions	131,681	105,823	127,245
Operating Segments
Segment Reporting Information [Line Items]
Total assets	5,919,904	5,112,209
Depreciation and Intangible amortization expense	216,663	183,915	136,463
Capital acquisitions	124,976	101,987	122,153
Operating Segments | Total North America
Segment Reporting Information [Line Items]
Total assets	2,944,083	2,010,138
Depreciation and Intangible amortization expense	89,231	80,244	81,582
Capital acquisitions	58,046	39,822	86,500
Operating Segments | North American Towables
Segment Reporting Information [Line Items]
Total assets	1,870,577	1,529,913
Depreciation and Intangible amortization expense	66,078	66,042	67,751
Capital acquisitions	35,816	27,219	69,321
Operating Segments | North American Motorized
Segment Reporting Information [Line Items]
Total assets	1,073,506	480,225
Depreciation and Intangible amortization expense	23,153	14,202	13,831
Capital acquisitions	22,230	12,603	17,179
Operating Segments | European
Segment Reporting Information [Line Items]
Total assets	2,975,821	3,102,071
Depreciation and Intangible amortization expense	127,432	103,671	54,881
Capital acquisitions	66,930	62,165	35,653
Other
Segment Reporting Information [Line Items]
Total assets	272,350	212,378
Depreciation and Intangible amortization expense	12,220	10,488	10,647
Capital acquisitions	5,620	2,664	3,493
Corporate
Segment Reporting Information [Line Items]
Total assets	461,834	446,873
Depreciation and Intangible amortization expense	1,698	1,764	1,667
Capital acquisitions	$ 1,085	$ 1,172	$ 1,599