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Intangibles, Net (Tables)

12 Months Ended

Jul. 31, 2012

Intangible Assets, Net (Excluding Goodwill) [Abstract]

Schedule of intangible assets

				July 31, 2012
				Gross Carrying Amount				Accumulated Amortization				Net Book Value				Weighted Average Remaining Useful Life (in years)
Amortized intangible assets:
Covenants not to compete				$	11,087			$	(10,685	)		$	402				4
Supply contracts					26,041				(18,762	)			7,279				6
Licenses and databases					1,316				(1,012	)			304				1
				$	38,444			$	(30,459	)		$	7,985

				July 31 , 2011
				Gross Carrying Amount				Accumulated Amortization				Net Book Value				Weighted Average Remaining Useful Life (in years)
Amortized intangible assets:
Covenants not to compete				$	10,896			$	(10,486	)		$	410				3
Supply contracts					27,238				(15,409	)			11,829				3
Licenses and databases					1,337				(828	)			509				3
				$	39,471			$	(26,723	)		$	12,748

Schedule of aggregate amortization expense on intangible assets

2013				$	3,499
2014					1,186
2015					765
2016					543
2017					317
Thereafter					1,675
				$	7,985

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- Definition

Tabular disclosure of the amount of amortization expense expected to be recorded in succeeding fiscal years for finite-lived intangible assets.

+ References

No definition available.

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- Definition

Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16323-109275



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16265-109275

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