Schedule of Segment Reporting Information, by Segment Balance Sheet Item (Detail) - USD ($) $ in Thousands	3 Months Ended
	Oct. 31, 2017	Oct. 31, 2016	Jul. 31, 2017
Segment Reporting Information [Line Items]
Total assets	$ 2,709,966		$ 2,557,931
Depreciation and amortization expense, total	22,698	$ 26,595
Capital acquisitions	32,092	26,493
Continuing Operations | Operating Segments | Recreational vehicles
Segment Reporting Information [Line Items]
Total assets	2,255,716		2,035,790
Depreciation and amortization expense, total	19,521	23,269
Capital acquisitions	29,907	26,021
Continuing Operations | Operating Segments | Recreational vehicles | Towables
Segment Reporting Information [Line Items]
Total assets	1,685,230		1,535,029
Depreciation and amortization expense, total	16,793	20,926
Capital acquisitions	17,592	20,865
Continuing Operations | Operating Segments | Recreational vehicles | Motorized
Segment Reporting Information [Line Items]
Total assets	570,486		500,761
Depreciation and amortization expense, total	2,728	2,343
Capital acquisitions	12,315	5,156
Continuing Operations | Operating Segments | Other
Segment Reporting Information [Line Items]
Total assets	153,743		156,996
Depreciation and amortization expense, total	2,809	3,004
Capital acquisitions	610	296
Continuing Operations | Operating Segments | Corporate
Segment Reporting Information [Line Items]
Total assets	300,507		$ 365,145
Depreciation and amortization expense, total	368	322
Capital acquisitions	$ 1,575	$ 176