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Noncash Share-based Compensation (Tables)
 6 Months Ended
Jun. 30, 2015
Noncash Share-based Compensation [Abstract]  
Schedule of Share-based Compensation Expense
The following table summarizes share-based compensation expense included in the Company's unaudited condensed consolidated statements of comprehensive income for the three and six months ended June 30, 2015 and 2014:
 
For the Three Months Ended June 30,
 
For the Six Months Ended June 30,
 
2015
 
2014
 
2015
 
2014
Share-based compensation:
 
 
 
 
 
 
 
Cost of revenue
$
1,031

 
$
959

 
$
2,044

 
$
1,681

Operating expenses:
 
 
 
 
 
 
 
Selling and marketing
2,280

 
1,736

 
4,312

 
2,925

General and administrative
2,372

 
2,034

 
5,720

 
3,517

Research and development
1,322

 
1,216

 
2,674

 
2,181

Total included in operating expenses
5,974

 
4,986

 
12,706

 
8,623

Total share-based compensation expense
$
7,005

 
$
5,945

 
$
14,750

 
$
10,304