Stockholders' Equity (Tables)
 9 Months Ended
Sep. 30, 2016
Equity [Abstract]  
Schedule of share-based compensation components
The following table summarizes the components of stock-based compensation expense included in our condensed consolidated statements of operations:
 
For the Three Months Ended September 30,
 
For the Nine Months Ended September 30,
 
2016
 
2015
 
2016
 
2015
 
(in thousands)
Cost of services
$
486

 
$
449

 
$
1,445

 
$
1,286

Sales and marketing
1,672

 
1,238

 
4,793

 
3,385

Technology and development
2,574

 
2,514

 
7,893

 
6,226

General and administrative
3,880

 
3,662

 
11,378

 
9,390

Total stock-based compensation
$
8,612

 
$
7,863

 
$
25,509

 
$
20,287