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Earnings per Share
 12 Months Ended
Dec. 31, 2014
Earnings Per Share [Abstract]  
Earnings per Share
Earnings per share
The following table sets forth the computation of basic and diluted earnings per share:
 
For the Year Ended December 31,
 
2014
 
2013
 
2012
Numerator:
 
 
 
 
 
Net (loss) income attributable to PROS Holdings, Inc.
$
(36,644
)
 
$
3,446

 
$
4,966

Denominator:
 
 
 
 
 
Weighted average shares (basic)
28,915

 
28,004

 
27,366

Dilutive effect of stock options, restricted stock units and stock appreciation rights
—

 
2,110

 
1,054

Weighted average shares (diluted)
28,915

 
30,114

 
28,420

Basic earnings per share
$
(1.27
)
 
$
0.12

 
$
0.18

Diluted earnings per share
$
(1.27
)
 
$
0.11

 
$
0.17


Approximately 452,000, 14,000 and 416,000 of potential common shares have not been considered in the diluted earnings per calculation for the years ended December 31, 2014, 2013 and 2012, respectively, as the effect would be anti-dilutive.

Since the Company will settle the principal amount of our Senior Notes (see Note 13) in cash, the treasury stock method is used for calculating any potential dilutive effect of the conversion spread on diluted net income per share, if applicable. The conversion spread will have a dilutive impact on diluted net income per share of common stock when the average market price of common stock for a given period exceeds the conversion price of $33.79 per share.