Warranty (Tables)

12 Months Ended

Jul. 31, 2011

Warranty

Reconciliation Of Warranty Reserves

Balance at July 31, 2009	$	9,215
Accruals for warranties issued during the reporting period		12,389
Accruals related to pre-existing warranties (including changes in estimates)		(1,244	)
Less settlements made during the period		(4,653	)
Balance at July 31, 2010	$	15,707
Accruals for warranties issued during the reporting period		8,406
Accruals related to pre-existing warranties (including changes in estimates)		7,735
Less settlements made during the period		(12,128	)
Balance at July 31, 2011	$	19,720