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Share-Based Compensation (Tables)
9 Months Ended
Sep. 30, 2011
Share-Based Compensation [Abstract] 
Schedule Of Assumptions Used In The Black-Scholes-Merton Model To Estimate The Fair Values Of Options Granted
     2011     2010  

Volatility

     37.09     32.50

Expected dividend yield

     4.00     4.00

Expected term (in years)

     7.0        7.0   

Risk-free interest rate

     2.97     2.39

Fair value

   $ 2.61      $ 1.85