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Share-Based Compensation
3 Months Ended
Mar. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Share-Based Compensation
Share-Based Compensation
Restricted Stock Units Awards
The following table summarizes the number of outstanding RSUs and activity as of and during the three months ended March 31, 2017:
 
Number of Shares
 
Weighted Average
Grant Date Fair Value
Non-vested at December 31, 2016
708,695

 
 
Granted
473,949

 
$
51.55

Vested
(62,795
)
 
 
Forfeited
(8,451
)
 
 
Non-vested at March 31, 2017
1,111,398

 
 

Employee Stock Purchase Plan

The Company recognized share-based compensation expense of $0.4 million under the 2016 Employee Stock Purchase Plan ("ESPP") for the three months ended March 31, 2017. As of March 31, 2017, there were 60,237 shares issued and 939,763 shares reserved for future issuance under the ESPP.

Share-based Compensation Expense
The amount of share-based compensation expense recognized in the unaudited condensed consolidated statements of operations was as follows (in thousands):
 
Three Months Ended March 31,
Income Statement Classification
2017
 
2016
Direct costs
$
2,713

 
$
1,259

Selling, general, and administrative expenses
3,106

 
1,557

Total share-based compensation expense
$
5,819

 
$
2,816