Schedule of Segment Reporting Information, by Segment (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jul. 31, 2012	Jul. 31, 2011	Jul. 31, 2010
Segment Reporting Information [Line Items]
Net sales	$ 3,084,660	$ 2,755,508	$ 2,276,557
Income (loss) before income taxes, total	180,691	152,627	171,393
Identifiable assets, total	1,243,054	1,198,070	964,073
Depreciation and amortization expense, total	24,978	24,009	13,229
Capital acquisitions	10,442	33,698	12,767
Recreation Vehicles
Segment Reporting Information [Line Items]
Net sales	2,639,798	2,340,442	1,848,549
Income (loss) before income taxes, total	177,442	159,138	156,232
Identifiable assets, total	817,343	789,645	499,838
Depreciation and amortization expense, total	22,132	20,980	10,793
Capital acquisitions	9,628	24,228	9,677
Recreation Vehicles | Towables
Segment Reporting Information [Line Items]
Net sales	2,285,863	1,977,416	1,556,591
Income (loss) before income taxes, total	158,973	146,361	145,604
Identifiable assets, total	734,439	696,059	413,112
Depreciation and amortization expense, total	20,010	18,506	7,735
Capital acquisitions	8,830	22,835	8,971
Recreation Vehicles | Motorized
Segment Reporting Information [Line Items]
Net sales	353,935	363,026	291,958
Income (loss) before income taxes, total	18,469	12,777	10,628
Identifiable assets, total	82,904	93,586	86,726
Depreciation and amortization expense, total	2,122	2,474	3,058
Capital acquisitions	798	1,393	706
Buses
Segment Reporting Information [Line Items]
Net sales	444,862	415,066	428,008
Income (loss) before income taxes, total	16,020	21,951	29,904
Identifiable assets, total	143,324	126,224	124,374
Depreciation and amortization expense, total	2,537	2,716	1,981
Capital acquisitions	771	9,417	2,888
Corporate
Segment Reporting Information [Line Items]
Income (loss) before income taxes, total	(12,771)	(28,462)	(14,743)
Identifiable assets, total	282,387	282,201	339,861
Depreciation and amortization expense, total	309	313	455
Capital acquisitions	$ 43	$ 53	$ 202