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Restructuring (Tables)
6 Months Ended
Jan. 31, 2012
Restructuring and Related Activities [Abstract]  
Restructuring-related costs
 

Balance at
July 31, 2011
(000's)

   

Expense
(000's)

   

Payments
(000's)
   

Balance at
January 31, 2012
(000's)

Severance $ 1,051 1,102 201 $ 1,952