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Commitments and Contingencies
12 Months Ended
Jul. 31, 2011
Commitments and Contingencies [Abstract]  
Commitments and Contingencies
9. Commitments and Contingencies
The Company has entered into various non-cancellable operating lease agreements. Rental expense charged to operations on a straight-line basis was $22,213, $23,712, and $25,971 for the years ended July 31, 2011, 2010, and 2009, respectively. Future minimum lease payments required under such leases in effect at July 31, 2011 are as follows, for the years ending July 31:
         
2012
  $ 18,350  
2013
    12,636  
2014
    10,667  
2015
    7,338  
2016
    5,478  
Thereafter
    2,557  
 
     
 
  $ 57,026  
 
     
In the normal course of business, the Company is named as a defendant in various lawsuits in which claims are asserted against the Company. In the opinion of management, the liabilities, if any, which may ultimately result from lawsuits are not expected to have a material effect on the consolidated financial statements of the Company.