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Earnings Per Share
 12 Months Ended
Dec. 31, 2011
Earnings Per Share [Abstract]  
Earnings Per Share [Text Block]

Note 16 – Earnings Per Share

The Company follows FASB's guidance regarding the calculation of earnings per share for nonvested stock awards with rights to non-forfeitable dividends. The guidance requires nonvested stock awards with rights to non-forfeitable dividends to be included as part of the basic weighted average share calculation under the two-class method.

The following table summarizes EPS calculations for the years ended December 31, 2011, December 31, 2010 and December 31, 2009:

           
  December 31, 
  2011 2010 2009 
Basic Earnings per Common Share         
 Net income attributable to Quaker Chemical Corporation$ 43,569  $31,807 $ 16,220 
 Less: income allocated to participating securities (782)  (654)  (280) 
 Net income available to common shareholders$ 42,787 $31,153 $ 15,940 
           
 Basic weighted average common shares outstanding 12,159,958  11,039,410  10,806,518 
Basic earnings per common share$3.52 $2.82 $1.48 
           
Diluted Earnings per Common Share         
 Net income attributable to Quaker Chemical Corporation$43,569 $31,807 $16,220 
 Less: income allocated to participating securities (775)  (646)  (279) 
 Net income available to common shareholders$42,794 $31,161 $15,941 
           
 Basic weighted average common shares outstanding 12,159,958  11,039,410  10,806,518 
 Effect of dilutive securities, employee stock options 158,215  202,551  59,244 
 Diluted weighted average common shares outstanding 12,318,173  11,241,961  10,865,762 
Diluted earnings per common share$3.47 $2.77 $1.47 

The following numbers of stock options are not included in dilutive earnings per share since in each case the effect would have been anti-dilutive: 11,683 in 2011, 0 in 2010 and 360,518 in 2009.