Segment Information (Schedule Of Segment Reporting Information, By Segment) (Details) (USD $) In Thousands	3 Months Ended
	Oct. 31, 2011	Oct. 31, 2010	Jul. 31, 2011
Segment Reporting Information [Line Items]
Net sales	$ 673,000	$ 606,684
Income (loss) before income taxes, total	34,648	33,786
Identifiable assets, total	1,182,369		1,198,070
Towables [Member] | Recreation Vehicles [Member]
Segment Reporting Information [Line Items]
Net sales	499,104	422,449
Income (loss) before income taxes, total	32,591	33,100
Identifiable assets, total	698,710		696,059
Motorized [Member] | Recreation Vehicles [Member]
Segment Reporting Information [Line Items]
Net sales	62,556	84,114
Income (loss) before income taxes, total	1,293	1,004
Identifiable assets, total	73,827		93,586
Recreation Vehicles [Member]
Segment Reporting Information [Line Items]
Net sales	561,660	506,563
Income (loss) before income taxes, total	33,884	34,104
Identifiable assets, total	772,537		789,645
Buses [Member]
Segment Reporting Information [Line Items]
Net sales	111,340	100,121
Income (loss) before income taxes, total	5,266	9,419
Identifiable assets, total	124,333		126,224
Corporate [Member]
Segment Reporting Information [Line Items]
Income (loss) before income taxes, total	(4,502)	(9,737)
Identifiable assets, total	$ 285,499		$ 282,201