Schedule of Segment Reporting Information, by Segment Balance Sheet Item (Detail) - USD ($) $ in Thousands	3 Months Ended
	Oct. 31, 2016	Oct. 31, 2015	Jul. 31, 2016
Segment Reporting Information [Line Items]
Total assets	$ 2,381,758		$ 2,325,464
Depreciation and amortization expense, total	26,595	$ 11,433
Capital acquisitions	26,493	14,914
Continuing Operations | Corporate
Segment Reporting Information [Line Items]
Total assets	253,361		266,501
Depreciation and amortization expense, total	322	278
Capital acquisitions	176	342
Continuing Operations | Operating Segments | Recreational vehicles
Segment Reporting Information [Line Items]
Total assets	1,971,378		1,902,141
Depreciation and amortization expense, total	23,269	8,099
Capital acquisitions	26,021	13,799
Continuing Operations | Operating Segments | Recreational vehicles | Towables
Segment Reporting Information [Line Items]
Total assets	1,459,849		1,425,168
Depreciation and amortization expense, total	20,926	7,456
Capital acquisitions	20,865	12,806
Continuing Operations | Operating Segments | Recreational vehicles | Motorized
Segment Reporting Information [Line Items]
Total assets	511,529		476,973
Depreciation and amortization expense, total	2,343	643
Capital acquisitions	5,156	993
Continuing Operations | Operating Segments | Other
Segment Reporting Information [Line Items]
Total assets	157,019		$ 156,822
Depreciation and amortization expense, total	3,004	3,056
Capital acquisitions	$ 296	$ 773