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Earnings Per Share
 9 Months Ended
Sep. 30, 2014
Earnings Per Share [Abstract]  
Earnings Per Share [Text Block]

Note 9 – Earnings Per Share

The following table summarizes earnings per share calculations for the three and nine months ended September 30, 2014 and September 30, 2013:

  Three Months Ended  Nine Months Ended
   September 30,   September 30,
  2014 2013 2014 2013
Basic earnings per common share           
 Net income attributable to Quaker Chemical Corporation$ 15,696  $12,551 $ 43,853  $42,253
 Less: income allocated to participating securities (140)  (109)  (385)  (358)
 Net income available to common shareholders$ 15,556 $12,442 $ 43,468 $41,895
 Basic weighted average common shares outstanding 13,133,668  13,062,417  13,114,553  13,034,289
Basic earnings per common share$1.18 $0.95 $3.31 $3.21
             
Diluted earnings per common share           
 Net income attributable to Quaker Chemical Corporation$15,696 $12,551 $43,853 $42,253
 Less: income allocated to participating securities (140)  (109)  (384)  (357)
 Net income available to common shareholders$15,556 $12,442 $43,469 $41,896
 Basic weighted average common shares outstanding 13,133,668  13,062,417  13,114,553  13,034,289
 Effect of dilutive securities 22,673  22,488  21,147  25,909
 Diluted weighted average common shares outstanding 13,156,341  13,084,905  13,135,700  13,060,198
Diluted earnings per common share$1.18 $0.95 $3.31 $3.21

The following number of stock options and restricted stock units are not included in diluted earnings per share since the effect would have been anti-dilutive: 6,146 and 2,858 for the three months ended September 30, 2014 and September 30, 2013, respectively, and 5,254 and 4,118 for the nine months ended September 30, 2014 and September 30, 2013, respectively.