Segment Information (Schedule Of Segment Reporting Information, By Segment) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Apr. 30, 2012	Apr. 30, 2011	Apr. 30, 2012	Apr. 30, 2011	Jul. 31, 2011
Segment Reporting Information [Line Items]
Number of reportable segments			3
Net Sales	$ 926,458	$ 852,059	$ 2,196,428	$ 1,984,970
Income (Loss) Before Income Taxes	61,219	57,318	117,363	98,485
Identifiable Assets	1,242,954		1,242,954		1,198,070
Recreation Vehicle [Member]
Segment Reporting Information [Line Items]
Net Sales	807,196	742,797	1,869,850	1,686,471
Income (Loss) Before Income Taxes	59,162	60,035	115,970	105,164
Identifiable Assets	888,915		888,915		789,645
Buses [Member]
Segment Reporting Information [Line Items]
Net Sales	119,262	109,262	326,578	298,499
Income (Loss) Before Income Taxes	2,828	4,472	10,693	17,683
Identifiable Assets	139,400		139,400		126,224
Corporate [Member]
Segment Reporting Information [Line Items]
Income (Loss) Before Income Taxes	(771)	(7,189)	(9,300)	(24,362)
Identifiable Assets	214,639		214,639		282,201
Towables [Member] | Recreation Vehicle [Member]
Segment Reporting Information [Line Items]
Net Sales	680,472	624,631	1,623,782	1,411,882
Income (Loss) Before Income Taxes	51,050	54,131	104,810	96,039
Identifiable Assets	780,638		780,638		696,059
Motorized [Member] | Recreation Vehicle [Member]
Segment Reporting Information [Line Items]
Net Sales	126,724	118,166	246,068	274,589
Income (Loss) Before Income Taxes	8,112	5,904	11,160	9,125
Identifiable Assets	$ 108,277		$ 108,277		$ 93,586