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Stock Based Compensation (Tables)
 9 Months Ended
Sep. 30, 2019
Share-based Payment Arrangement [Abstract]  
Schedule of expenses related to share-based payments
The following table highlights the expense related to stock based compensation for the three and nine months ended September 30, 2019 and 2018:
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
(in thousands)
2019
 
2018
 
2019
 
2018
Restricted stock units (a)
$
3,014

 
$
3,281

 
$
9,177

 
$
8,049

Restricted stock
—

 
2

 
—

 
100

Stock options
—

 
27

 
—

 
77

Stock based compensation
$
3,014

 
$
3,310

 
$
9,177

 
$
8,226


(a) Includes service-based and performance-based restricted stock units.