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Earnings Per Share
 12 Months Ended
Dec. 31, 2012
Earnings Per Share [Abstract]  
Earnings Per Share [Text Block]

Note 14 – Earnings Per Share

The following table summarizes EPS calculations for the years ended December 31, 2012, December 31, 2011 and December 31, 2010:

  December 31, 
  2012 2011 2010 
      (re-cast)  (re-cast) 
Basic earnings per common share         
 Net income attributable to Quaker Chemical Corporation$ 47,405  $45,892 $ 32,120 
 Less: income allocated to participating securities (526)  (825)  (660) 
 Net income available to common shareholders$ 46,879 $45,067 $ 31,460 
           
 Basic weighted average common shares outstanding 12,871,703  12,159,958  11,039,410 
Basic earnings per common share$3.64 $3.71 $2.85 
           
Diluted earnings per common share         
 Net income attributable to Quaker Chemical Corporation$47,405 $45,892 $32,120 
 Less: income allocated to participating securities (524)  (817)  (652) 
 Net income available to common shareholders$46,881 $45,075 $31,468 
           
 Basic weighted average common shares outstanding 12,871,703  12,159,958  11,039,410 
 Effect of dilutive securities 58,798  158,215  202,551 
 Diluted weighted average common shares outstanding 12,930,501  12,318,173  11,241,961 
Diluted earnings per common share$3.63 $3.66 $2.80 

The following number of stock options are not included in diluted earnings per share since the effect would have been anti-dilutive: 4,417 in 2012, 11,683 in 2011 and 0 in 2010.