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Business and Reporting Policies (Tables)
9 Months Ended
Sep. 30, 2011
Business and Reporting Policies 
Summary of Selling Days
The following table summarizes the number of selling days for the periods presented (based on a standard five-day selling week):
 
 
First
Quarter    
 
Second
Quarter    
 
Third
Quarter    
 
Fourth
Quarter    
 
Full
Year    
2011
65

 
65

 
65

 
65

 
260

2010
66

 
65

 
65

 
65

 
261

Change
(1
)
 
—

 
—

 
—

 
(1
)