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Share Based Compensation (Table)
6 Months Ended
Jun. 30, 2013
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Schedule Of Assumptions Used To Estimate The Fair Values Of Options Granted
  Six Months Ended June 30, 
  2013 2012 
 Exercise price$ 11.47  $ 9.89  
 Volatility 37.80%  37.61% 
 Expected dividend yield 4.00%  4.00% 
 Expected term (in years) 7.0   7.0  
 Risk-free interest rate 1.22%  1.09% 
 Fair value$ 2.81  $ 2.40