Commitments, guarantees, and contingencies (Tables)

12 Months Ended

Jul. 31, 2012

Product General Warranty Liability

The following table presents the Company’s product general warranty liability for the years then ended:

	July 31,
	2012			2011
Balance at the beginning of the period	$	5,174		$	6,103
Accrual		6,407			5,381
Settlements made in cash or in kind during the period		(5,947	)		(6,310	)
Balance at the end of the period	$	5,634		$	5,174