Schedule of Segment Reporting Information, by Segment Balance Sheet Item (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2019	Jul. 31, 2018	Jul. 31, 2017
Segment Reporting Information [Line Items]
Total assets	$ 5,660,446	$ 2,778,665	$ 2,557,931
Depreciation and Intangible amortization expense, total	148,777	93,223	98,258
Capital acquisitions	127,245	137,306	117,755
Operating Segments | Recreational vehicles
Segment Reporting Information [Line Items]
Total assets	5,040,949	2,147,191	2,035,790
Depreciation and Intangible amortization expense, total	136,463	80,764	84,961
Capital acquisitions	122,153	119,964	114,478
Operating Segments | Recreational vehicles | North American [Member]
Segment Reporting Information [Line Items]
Total assets	1,963,145	2,147,191	2,035,790
Depreciation and Intangible amortization expense, total	81,582	80,764	84,961
Capital acquisitions	86,500	119,964	114,478
Operating Segments | Recreational vehicles | European [Member]
Segment Reporting Information [Line Items]
Total assets	3,077,804	0	0
Depreciation and Intangible amortization expense, total	54,881	0	0
Capital acquisitions	35,653	0	0
Operating Segments | Recreational vehicles | North American Towables
Segment Reporting Information [Line Items]
Total assets	1,516,519	1,654,361	1,535,029
Depreciation and Intangible amortization expense, total	67,751	68,964	75,568
Capital acquisitions	69,321	85,304	72,801
Operating Segments | Recreational vehicles | North American Motorized
Segment Reporting Information [Line Items]
Total assets	446,626	492,830	500,761
Depreciation and Intangible amortization expense, total	13,831	11,800	9,393
Capital acquisitions	17,179	34,660	41,677
Corporate and Eliminations
Segment Reporting Information [Line Items]
Total assets	163,897	167,965	156,996
Depreciation and Intangible amortization expense, total	10,647	10,861	11,967
Capital acquisitions	3,493	8,440	1,157
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Total assets	455,600	463,509	365,145
Depreciation and Intangible amortization expense, total	1,667	1,598	1,330
Capital acquisitions	$ 1,599	$ 8,902	$ 2,120