Warranty (Tables)

6 Months Ended

Jan. 31, 2012

Warranty [Abstract]

Reconciliation Of Warranty Reserves

	January 31,
	2012			2011
Balance at beginning of year	$	19,720		$	15,707
Accruals for warranties issued during the reporting period		1,826			3,436
Adjustments related to pre - existing warranties (including changes in estimates)		(1,294	)		2,367
Less settlements made during the period		(5,638	)		(4,342	)
Balance at end of period	$	14,614		$	17,168