Business Segments (Schedule Of Segment Reporting Information, By Segment) (Details) (USD $) In Thousands	12 Months Ended
	Jul. 31, 2011	Jul. 31, 2010	Jul. 31, 2009
Net sales	$ 2,755,508	$ 2,276,557	$ 1,521,896
Income (loss) before income taxes, total	152,627	171,393	23,395
Identifiable assets, total	1,198,070	964,073	951,124
Depreciation and amortization expense, total	24,009	13,229	13,483
Capital acquisitions	33,698	12,767	5,135
Towables [Member] | Recreation Vehicles [Member]
Net sales	1,977,416	1,556,591	953,279
Income (loss) before income taxes, total	146,361	145,604	47,347
Identifiable assets, total	696,059	413,112	358,562
Depreciation and amortization expense, total	18,506	7,735	8,371
Capital acquisitions	22,835	8,971	2,297
Motorized [Member] | Recreation Vehicles [Member]
Net sales	363,026	291,958	161,727
Income (loss) before income taxes, total	12,777	10,628	(29,728)
Identifiable assets, total	93,586	86,726	73,969
Depreciation and amortization expense, total	2,474	3,058	2,979
Capital acquisitions	1,393	706	1,847
Recreation Vehicles [Member]
Net sales	2,340,442	1,848,549	1,115,006
Income (loss) before income taxes, total	159,138	156,232	17,619
Identifiable assets, total	789,645	499,838	432,531
Depreciation and amortization expense, total	20,980	10,793	11,350
Capital acquisitions	24,228	9,677	4,144
Buses [Member]
Net sales	415,066	428,008	406,890
Income (loss) before income taxes, total	21,951	29,904	17,422
Identifiable assets, total	126,224	124,374	106,823
Depreciation and amortization expense, total	2,716	1,981	1,864
Capital acquisitions	9,417	2,888	512
Corporate [Member]
Income (loss) before income taxes, total	(28,462)	(14,743)	(11,646)
Identifiable assets, total	282,201	339,861	411,770
Depreciation and amortization expense, total	313	455	269
Capital acquisitions	53	202	479
Export [Member]
Net sales	$ 444,364	$ 364,105	$ 237,584