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Earnings Per Share
 9 Months Ended
Sep. 30, 2013
Earnings Per Share [Abstract]  
Earnings Per Share [Text Block]

Note 7 – Earnings Per Share

The following table summarizes earnings per share calculations for the three and nine months ended September 30, 2013 and September 30, 2012:

  Three Months Ended  Nine Months Ended
   September 30,   September 30,
  2013 2012 2013 2012
Basic earnings per common share           
 Net income attributable to Quaker Chemical Corporation$ 12,551  $10,925 $ 42,253  $34,398
 Less: income allocated to participating securities (109)  (103)  (358)  (402)
 Net income available to common shareholders$ 12,442 $10,822 $ 41,895 $33,996
 Basic weighted average common shares outstanding 13,062,417  12,937,417  13,034,289  12,840,029
Basic earnings per common share$0.95 $0.84 $3.21 $2.65
             
Diluted earnings per common share           
 Net income attributable to Quaker Chemical Corporation$12,551 $10,925 $42,253 $34,398
 Less: income allocated to participating securities (109)  (102)  (357)  (401)
 Net income available to common shareholders$12,442 $10,823 $41,896 $33,997
 Basic weighted average common shares outstanding 13,062,417  12,937,417  13,034,289  12,840,029
 Effect of dilutive securities and employee stock options 22,488  33,892  25,909  70,265
 Diluted weighted average common shares outstanding 13,084,905  12,971,309  13,060,198  12,910,294
Diluted earnings per common share$0.95 $0.83 $3.21 $2.63

The following number of stock options are not included in diluted earnings per share since the effect would have been anti-dilutive: 2,858 and 4,537 for the three months ended September 30, 2013 and September 30, 2012, respectively, and 4,118 and 6,386 for the nine months ended September 30, 2013 and September 30, 2012, respectively.