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Stock-based Compensation (Tables)
 6 Months Ended
Jun. 30, 2019
Share-based Payment Arrangement [Abstract]  
Schedule of Nonvested Restricted Stock Units Activity
The following summarizes our RSU activity (units in thousands):
 
Number of Units
 
Weighted Average Grant-Date Fair Value
 
 
 
 
Outstanding at December 31, 2017
307

 
$
9.84

Units granted
70

 
5.76

Units forfeited
(15
)
 
8.76

Outstanding at June 30, 2018
362

 
9.09

Units vested
(95
)
 
9.84

Units forfeited
(3
)
 
9.96

Outstanding at December 31, 2018
264

 
8.91

Units vested
(8
)
 
5.65

Units forfeited
(6
)
 
6.13

Outstanding at June 30, 2019
250

 
$
9.08