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Changes in Carrying Amount of Goodwill by Reportable Segment (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended			12 Months Ended					12 Months Ended
	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2014	Jul. 31, 2014 Towables	Jul. 31, 2014 Towables	Jul. 31, 2012 Towables	Jul. 31, 2014 Motorized	Jul. 31, 2012 Motorized	Jul. 31, 2013 Buses
Goodwill [Line Items]
Goodwill		$ 262,461	$ 273,831		$ 256,579	$ 238,103	$ 17,252	$ 17,252	$ 7,106
Accumulated impairment charges		(17,252)	(17,252)				(17,252)	(17,252)
Goodwill, Beginning Balance	238,103	245,209		238,103		238,103			7,106
Goodwill acquired	18,476	5,263		18,476					5,263
Impairment charges - discontinued operations		(6,810)							(6,810)
Discontinued operations reclassification		(5,559)							(5,559)
Goodwill, Ending Balance	$ 256,579	$ 238,103		$ 256,579		$ 238,103

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