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Calculation of Earnings Per Share
6 Months Ended
Jun. 30, 2011
Calculation of Earnings Per Share [Abstract]  
Calculation of Earnings Per Share
2.  
Calculation of Earnings Per Share
                                 
    Three Months     Six Months  
For the Periods Ended June 30,   2011     2010     2011     2010  
(in thousands, except shares and per share data)                                
Calculation of Basic Earnings Per Share:
                               
Net Income
  $ 3,520     $ 3,340     $ 17,267     $ 17,314  
Weighted average shares outstanding
    9,557,707       9,467,222       9,546,606       9,443,708  
 
                       
Basic Earnings Per Share
  $ 0.37     $ 0.35     $ 1.81     $ 1.83  
 
                       
 
                               
Calculation of Diluted Earnings Per Share:
                               
Reconciliation of Numerator:
                               
Net Income
  $ 3,520     $ 3,340     $ 17,267     $ 17,314  
Effect of 8.25% Convertible debentures
    15       19       31       37  
 
                       
Adjusted numerator — Diluted
  $ 3,535     $ 3,359     $ 17,298     $ 17,351  
 
                       
 
                               
Reconciliation of Denominator:
                               
Weighted shares outstanding — Basic
    9,557,707       9,467,222       9,546,606       9,443,708  
Effect of dilutive securities:
                               
Share-based Compensation
    20,699       3,347       21,958       19,437  
8.25% Convertible debentures
    72,481       86,783       73,810       87,525  
 
                       
Adjusted denominator — Diluted
    9,650,887       9,557,352       9,642,374       9,550,670  
 
                       
 
                               
Diluted Earnings Per Share
  $ 0.37     $ 0.35     $ 1.79     $ 1.82