Warranty (Tables)

12 Months Ended

Jul. 31, 2012

Warranty [Abstract]

Reconciliation Of Warranty Reserves

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
Accruals for warranties issued during the reporting period		5,002
Accruals related to pre-existing warranties (including changes in estimates)		(2,956	)
Less settlements made during the period		(10,861	)
Balance at July 31, 2012	$	10,905