XML 63 R41.htm IDEA: XBRL DOCUMENT  v2.3.0.11
Summary Of Significant Accounting Policies (Narrative) (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
 12 Months Ended
Jul. 31, 2011
days
Jul. 31, 2010
Jul. 31, 2009
Jul. 31, 2008
Cash and cash equivalents $ 215,435 $ 247,751 $ 221,684 $ 189,620
Depreciation expense 13,747 12,719 13,007  
Other assets amortization period, minimum years 20      
Other assets amortization period, maximum years 25      
Self-insured retention for products liability and personal injury matters 5,000      
Excess liability insurance 50,000      
Payments received on sale of products within days 15      
Advertising costs 7,149 5,377 5,770  
Option vesting period, minimum years 3      
Option vesting period, maximum years 5      
Antidilutive stock options outstanding 729,826 784,000 404,061  
Dealer Networks [Member]
        
Other assets amortization period, minimum years 5      
Other assets amortization period, maximum years 15      
Non-Compete Agreements [Member]
        
Other assets amortization period, minimum years 5      
Other assets amortization period, maximum years 15      
Trademarks [Member]
        
Other assets amortization period, minimum years 20      
Other assets amortization period, maximum years 25      
Held By One Financial institution [Member]
        
Cash and cash equivalents 181,012 162,888    
Held At Various Other Financial Institutions [Member]
        
Cash and cash equivalents 34,423 84,863    
Buildings And Improvements [Member]
        
Property, plant and equipment, estimated useful life, minimum years 10      
Property, plant and equipment, estimated useful life, maximum years 39      
Machinery And Equipment [Member]
        
Property, plant and equipment, estimated useful life, minimum years 3      
Property, plant and equipment, estimated useful life, maximum years 10      
Selling, General And Administrative Expenses [Member]
        
Depreciation expense $ 3,022 $ 2,545 $ 1,728