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Earnings Per Share
9 Months Ended
Sep. 30, 2011
Earnings Per Share [Abstract] 
Earnings Per Share

12.       Earnings Per Share

The following table sets forth the computation of basic and diluted income per share, including a reconciliation of net income and the number of shares used in computing basic and diluted earnings per share. Basic income per share is determined using the weighted average shares of common stock outstanding during the period, including deferred stock units. Diluted income per share is determined using the weighted average shares of common stock outstanding during the period, including deferred stock units, and assumes all potentially dilutive securities were converted into common shares at the earliest date possible. There were no potentially dilutive securities outstanding during the three and nine months ended September 30, 2011 and 2010.

     Three Months Ended Nine Months Ended
     September 30, September 30,
(Amounts in thousands, except share and per share amounts) 2011 2010 2011 2010
 Net income attributable to common            
   stockholders – basic and diluted $ 20,425 $ 17,875 $ 58,789 $ 48,538
                
 Weighted average shares outstanding – basic and diluted    5,106,984   5,105,936   5,106,427   5,105,936
                
 Net income per common share – basic and diluted $ 4.00 $ 3.50 $ 11.51 $ 9.51