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Share-Based Compensation (Tables)
9 Months Ended
Sep. 30, 2019
Share-based Payment Arrangement [Abstract]  
Schedule of Share-Based Compensation Expense
Total share-based compensation expense, net of forfeitures, for the three and nine months ended September 30, 2019 and 2018 is detailed in the following table:   
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
Income Statement Classification
2019
 
2018
 
2019
 
2018
Direct cost of revenues
$
2,327

 
$
2,459

 
$
10,129

 
$
8,665

Selling, general and administrative expenses
3,478

 
2,939

 
8,608

 
8,286

Total share-based compensation expense
$
5,805


$
5,398


$
18,737


$
16,951