Commitments and Contingencies (Tables)

12 Months Ended

Jul. 31, 2011

Commitments and Contingencies Disclosure [Abstract]

future minimum lease commitments under noncancelable capital and operating leases

Years Ending July 31,	Capital Leases			Operating Leases
2012	$	231		$	18,984
2013		204			15,147
2014		182			10,470
2015		—			8,067
2016		—			6,175
Thereafter		—			37,029
		617		$	95,872
Less amount representing interest		(36	)
	$	581