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Earnings per Share Data (Tables)
6 Months Ended
Jun. 30, 2013
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted
The following table sets forth the weighted-average shares used in calculating the earnings per share for the three-month periods ended June 30, 2013 and 2012.
 
 
 
Three Months Ended 
 June 30,
 
Six Months Ended 
 June 30,
 
 
2013
 
2012
 
2013
 
2012
Basic weighted-average shares
 
22,197,000

 
23,107,000

 
22,155,000

 
23,349,000

Conversion of unsecured loan notes
 
7,000

 
7,000

 
7,000

 
7,000

Unvested options and RSUs
 
1,091,000

 
870,000

 
971,000

 
766,000

Diluted weighted-average shares
 
23,295,000

 
23,984,000

 
23,133,000

 
24,122,000

 
Fuel Tech had 1,658,000 and 1,547,000 weighted average stock awards outstanding at June 30, 2013 and 2012, respectively, that were not dilutive for the purposes of inclusion in the calculation of diluted earnings per share but could potentially become dilutive in future periods.