Warranty (Tables)

3 Months Ended

Oct. 31, 2012

Warranty [Abstract]

Reconciliation Of Warranty Reserves

	October 31,
	2012			2011
Beginning balance	$	10,905		$	19,720
Accruals for warranties issued during the reporting period		1,411			791
Accruals related to pre-existing warranties (including changes in estimates)		(337	)		(535	)
Less settlements made during the period		(915	)		(3,841	)
Ending balance	$	11,064		$	16,135