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Restructuring (Tables)
9 Months Ended
Apr. 30, 2012
Restructuring and Related Activities [Abstract]  
Restructuring-related costs

 

                             
       

Balance at
July 31, 2011
(in 000's)

   

Expense
(in 000's)

   

Payments
(in 000's)

   

Balance at
April 30, 2012
(in 000's)

 
  Severance     $1,051     1,389     698     $1,742