Schedule of Segment Reporting Information, by Segment Balance Sheet Item (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2018	Jul. 31, 2017	Jul. 31, 2016
Segment Reporting Information [Line Items]
Total assets	$ 2,778,665	$ 2,557,931	$ 2,325,464
Depreciation and amortization expense, total	93,223	98,258	52,575
Capital acquisitions	137,306	117,755	53,974
Operating Segments | Recreational vehicles
Segment Reporting Information [Line Items]
Total assets	2,147,191	2,035,790	1,902,141
Depreciation and amortization expense, total	80,764	84,961	39,048
Capital acquisitions	119,964	114,478	48,680
Operating Segments | Recreational vehicles | Towables
Segment Reporting Information [Line Items]
Total assets	1,654,361	1,535,029	1,425,168
Depreciation and amortization expense, total	68,964	75,568	36,054
Capital acquisitions	85,304	72,801	37,489
Operating Segments | Recreational vehicles | Motorized
Segment Reporting Information [Line Items]
Total assets	492,830	500,761	476,973
Depreciation and amortization expense, total	11,800	9,393	2,994
Capital acquisitions	34,660	41,677	11,191
Corporate and Eliminations [Member]
Segment Reporting Information [Line Items]
Total assets	167,965	156,996	156,822
Depreciation and amortization expense, total	10,861	11,967	12,352
Capital acquisitions	8,440	1,157	2,799
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Total assets	463,509	365,145	266,501
Depreciation and amortization expense, total	1,598	1,330	1,175
Capital acquisitions	$ 8,902	$ 2,120	$ 2,495