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Restructuring (Tables)
12 Months Ended
Jul. 31, 2012
Restructuring and Related Activities [Abstract]  
Schedule of restructuring-related costs
 
     Balance at
July 31, 2011
(in 000’s)
   Expense
(in 000’s)
   Payments
(in 000’s)
   Balance at
July 31, 2012
(in 000’s)
Severance
              $ 1,051             1,675             926           $ 1,800