XML 32 R26.htm IDEA: XBRL DOCUMENT  v2.3.0.11
Share-Based Compensation (Tables)
6 Months Ended
Jun. 30, 2011
Share-Based Compensation  
Weighted Average Fair Value Of Options Granted
   
June 30, 2011
       
Expected volatility
    37.83 %
Expected term (in years)
    6.3  
Risk-free rate
    2.89 %
Weighted average grant date fair value
  $ 9.76  
         
Stock Option Information