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Goodwill And Other Intangible Assets (Tables)
3 Months Ended
Oct. 31, 2012
Goodwill And Other Intangible Assets [Abstract]  
Reconciliation Of Goodwill
    Engine
Products
    Industrial Products     Total
Goodwill
 
Balance as of July 31, 2012   $ 71,747     $ 91,202     $ 162,949  
Foreign exchange translation     376       2,133       2,509  
Balance as of October 31, 2012   $ 72,123     $ 93,335     $ 165,458