Income Taxes (Schedule Of Deferred Income Taxes) (Details) (USD $) In Thousands	Jul. 31, 2011	Jul. 31, 2010
Income Taxes
Inventory basis	$ (251)	$ (715)
Employee benefits	3,102	2,506
Self-insurance reserves	8,036	10,077
Accrued product warranties	24,443	19,629
Accrued incentives	2,948	2,538
Sales returns and allowances	1,231	1,269
Accrued expenses	2,938	1,088
Unrecognized tax benefits	597	2,406
Other	(1,456)	701
Total current net deferred tax asset	41,588	39,499
Property basis	(5,166)	(1,552)
Investments	(898)	(1,330)
Deferred compensation	4,836	3,719
Intangibles	(37,513)	(5,436)
Unrecognized tax benefits	13,882	11,795
Total net long-term deferred tax asset (liability)	(24,859)	7,196
Net deferred tax asset	$ 16,729	$ 46,695