Schedule of Segment Reporting Information, by Segment Balance Sheet Item (Detail) (USD $) In Thousands, unless otherwise specified	Apr. 30, 2014	Jul. 31, 2013
Segment Reporting Information [Line Items]
Identifiable assets	$ 1,372,403	$ 1,328,268
Continuing Operations | Recreation Vehicles
Segment Reporting Information [Line Items]
Identifiable assets	1,129,325	885,781
Continuing Operations | Recreation Vehicles | Towables
Segment Reporting Information [Line Items]
Identifiable assets	910,674	759,658
Continuing Operations | Recreation Vehicles | Motorized
Segment Reporting Information [Line Items]
Identifiable assets	218,651	126,123
Continuing Operations | Corporate
Segment Reporting Information [Line Items]
Identifiable assets	243,078	305,981
Discontinued Operations
Segment Reporting Information [Line Items]
Identifiable assets		$ 136,506