Intangibles, Net

12 Months Ended

Jul. 31, 2011

Intangible Assets, Net (Excluding Goodwill) [Abstract]

Intangibles, Net

(8) Intangibles, Net

Intangible assets consist of the following (in thousands, except remaining useful life):

	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

 

	July 31 , 2010
	Gross Carrying Amount		Accumulated Amortization			Net Book Value		Weighted Average Remaining Useful Life (in years)
Amortized intangible assets:
Covenants not to compete	$	10,697	$	(10,233	)	$	464		1
Supply contracts		22,365		(10,521	)		11,844		4
Licenses and databases		1,317		(609	)		708		4
	$	34,379	$	(21,363	)	$	13,016

 

Aggregate amortization expense on intangible assets was $4.7 million, $3.9 million and $4.1 million for the fiscal years ended July 31, 2011, 2010 and 2009, respectively. Intangible amortization expense for the next five fiscal years based upon July 31, 2011 intangible assets is expected to be as follows (in thousands):

2012	$	4,926
2013		4,124
2014		1,338
2015		1,090
2016		875
Thereafter		395
	$	12,748