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Product Warranty (Tables)
12 Months Ended
Jul. 31, 2011
Product Warranty  
Schedules Of Warranty Reserves
    Year Ended         Year Ended         Year Ended  
    July 31, 2011         July 31, 2010         July 31, 2009  

Beginning Balance

    $            51,467          $          41,717          $        61,743   

Provision

    61,922          57,314          32,236   

Payments

    (57,514       (47,564       (52,262

Heartland acquisition

                  10,179                               –                               –   

Ending Balance

    $            66,054          $          51,467          $          41,717