XML 113 R58.htm IDEA: XBRL DOCUMENT v2.4.0.6
Intangibles, Net (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Jul. 31, 2012
Jul. 31, 2011
Amortized intangible assets:    
Gross Carrying Amount $ 38,444 $ 39,471
Accumulated Amortization (30,459) (26,723)
Intangibles, net 7,985 12,748
Covenants not to compete
   
Amortized intangible assets:    
Gross Carrying Amount 11,087 10,896
Accumulated Amortization (10,685) (10,486)
Intangibles, net 402 410
Weighted Average Remaining Useful Life (in years) 4 years 3 years
Supply contracts
   
Amortized intangible assets:    
Gross Carrying Amount 26,041 27,238
Accumulated Amortization (18,762) (15,409)
Intangibles, net 7,279 11,829
Weighted Average Remaining Useful Life (in years) 6 years 3 years
Licenses and databases
   
Amortized intangible assets:    
Gross Carrying Amount 1,316 1,337
Accumulated Amortization (1,012) (828)
Intangibles, net $ 304 $ 509
Weighted Average Remaining Useful Life (in years) 1 year 3 years