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Acquisitions
 3 Months Ended
Oct. 31, 2015
Business Combinations [Abstract]  
Acquisitions
Acquisitions
On August 31, 2015, the Company announced that it had acquired 100 percent of the shares of Engineered Products Company, a leading designer and manufacturer of indicators, gauges, switches and sensors for engine air and liquid filtration systems. Founded in 1977, Engineered Products generates annual sales of approximately $9.0 million through its Filter Minder® brand.