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Goodwill
 12 Months Ended
Jul. 31, 2013
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill
(6)
   Goodwill
 
The change in carrying amount of goodwill is as follows (in thousands): 

Balance as of July 31, 2011
               $ 198,620   
Goodwill recorded during the period
                  1,420   
Effect of foreign currency translation
                  (3,602 )  
Balance as of July 31, 2012
               $ 196,438   
Goodwill recorded during the period
                  73,414   
Effect of foreign currency translation
                  (2,389 )  
Balance as of July 31, 2013
               $ 267,463   
 
In accordance with the guidance in ASC 350, goodwill is tested for impairment on an annual basis or upon the occurrence of circumstances that indicate that goodwill may be impaired. The Company’s annual impairment tests were performed in the fourth quarter of fiscal 2013 and 2012 and goodwill was not impaired. As of July 31, 2013 and 2012, the cumulative amount of goodwill impairment losses recognized totaled $21.8 million.