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Stock-based Compensation
 9 Months Ended
Sep. 30, 2013
Stock-based Compensation
Stock-based Compensation
Total stock-based compensation expense and its net impact on basic and diluted earnings per share are as follows:
 
Three Months Ended
 
Nine Months Ended
(in thousands, except per share data)
September 30,
2013
 
September 30,
2012
 
September 30,
2013
 
September 30,
2012
Cost of sales:
 
 
 
 
 
 
 
Software licenses
$
335

 
$
369

 
$
1,023

 
$
1,139

Maintenance and service
590

 
558

 
1,762

 
1,680

Operating expenses:
 
 
 
 
 
 
 
Selling, general and administrative
4,392

 
3,873

 
12,755

 
11,275

Research and development
3,764

 
3,304

 
11,202

 
9,836

Stock-based compensation expense before taxes
9,081

 
8,104

 
26,742

 
23,930

Related income tax benefits
(2,623
)
 
(2,062
)
 
(8,490
)
 
(6,330
)
Stock-based compensation expense, net of taxes
$
6,458

 
$
6,042

 
$
18,252

 
$
17,600

Net impact on earnings per share
 
 
 
 
 
 
 
Basic earnings per share
$
(0.07
)
 
$
(0.07
)
 
$
(0.20
)
 
$
(0.19
)
Diluted earnings per share
$
(0.07
)
 
$
(0.06
)
 
$
(0.19
)
 
$
(0.19
)