Schedule of Segment Reporting Information, by Segment Balance Sheet Item (Detail) (USD $) In Thousands, unless otherwise specified	Jan. 31, 2013	Jul. 31, 2012
Segment Reporting Information [Line Items]
Identifiable Assets	$ 1,208,994	$ 1,243,054
Recreation Vehicles
Segment Reporting Information [Line Items]
Identifiable Assets	862,084	817,343
Buses
Segment Reporting Information [Line Items]
Identifiable Assets	160,383	143,324
Corporate
Segment Reporting Information [Line Items]
Identifiable Assets	186,527	282,387
Towables | Recreation Vehicles
Segment Reporting Information [Line Items]
Identifiable Assets	758,002	734,439
Motorized | Recreation Vehicles
Segment Reporting Information [Line Items]
Identifiable Assets	$ 104,082	$ 82,904