Goodwill And Other Intangible Assets (Narrative) (Details) (USD $) In Thousands, unless otherwise specified			3 Months Ended	6 Months Ended
	Jan. 31, 2012	Jul. 31, 2011	Oct. 31, 2010 Trademarks [Member]	Jan. 31, 2012 Trademarks [Member] years	Jan. 31, 2012 Buses [Member]
Finite-Lived Intangible Assets [Line Items]
Definite-lived assets, useful lives, years				25
Definite-lived assets, useful lives minimum, years				20
Definite-lived assets, useful lives maximum, years				25
Goodwill	$ 245,209	$ 244,452			$ 7,106
Indefinite-lived intangible assets impairment			$ 2,036