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Stock-based Compensation
 6 Months Ended
Jun. 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
 
Six Months Ended
(in thousands, except per share data)
June 30,
2013
 
June 30,
2012
 
June 30,
2013
 
June 30,
2012
Cost of sales:
 
 
 
 
 
 
 
Software licenses
$
345

 
$
402

 
$
688

 
$
770

Maintenance and service
588

 
563

 
1,172

 
1,122

Operating expenses:
 
 
 
 
 
 
 
Selling, general and administrative
4,167

 
3,763

 
8,363

 
7,402

Research and development
3,774

 
3,296

 
7,438

 
6,532

Stock-based compensation expense before taxes
8,874

 
8,024

 
17,661

 
15,826

Related income tax benefits
(2,471
)
 
(2,023
)
 
(5,867
)
 
(4,268
)
Stock-based compensation expense, net of taxes
$
6,403

 
$
6,001

 
$
11,794

 
$
11,558

Net impact on earnings per share
 
 
 
 
 
 
 
Basic earnings per share
$
(0.07
)
 
$
(0.06
)
 
$
(0.13
)
 
$
(0.12
)
Diluted earnings per share
$
(0.07
)
 
$
(0.06
)
 
$
(0.12
)
 
$
(0.12
)