Segment Information (Schedule Of Segment Reporting Information, By Segment) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jan. 31, 2012	Jan. 31, 2011	Jan. 31, 2012	Jan. 31, 2011	Jul. 31, 2011
Segment Reporting Information [Line Items]
Net Sales	$ 596,970	$ 526,227	$ 1,269,970	$ 1,132,911
Income (Loss) Before Income Taxes	21,496	7,381	56,144	41,167
Identifiable Assets	1,142,631		1,142,631		1,198,070
Recreation Vehicle [Member]
Segment Reporting Information [Line Items]
Net Sales	500,994	437,111	1,062,654	943,674
Income (Loss) Before Income Taxes	22,924	11,025	56,808	45,129
Identifiable Assets	773,828		773,828		789,645
Buses [Member]
Segment Reporting Information [Line Items]
Net Sales	95,976	89,116	207,316	189,237
Income (Loss) Before Income Taxes	2,599	3,792	7,865	13,211
Identifiable Assets	130,620		130,620		126,224
Corporate [Member]
Segment Reporting Information [Line Items]
Income (Loss) Before Income Taxes	(4,027)	(7,436)	(8,529)	(17,173)
Identifiable Assets	238,183		238,183		282,201
Towables [Member] | Recreation Vehicle [Member]
Segment Reporting Information [Line Items]
Net Sales	444,206	364,802	943,310	787,251
Income (Loss) Before Income Taxes	21,169	8,808	53,760	41,908
Identifiable Assets	693,123		693,123		696,059
Motorized [Member] | Recreation Vehicle [Member]
Segment Reporting Information [Line Items]
Net Sales	56,788	72,309	119,344	156,423
Income (Loss) Before Income Taxes	1,755	2,217	3,048	3,221
Identifiable Assets	$ 80,705		$ 80,705		$ 93,586