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Stock-based Compensation (Tables)
 3 Months Ended
Mar. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [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, 2016
416

 
$
9.87

Units forfeited
(3
)
 
9.01

Outstanding at March 31, 2017
413

 
9.88

Units vested
(95
)
 
9.97

Units forfeited
(11
)
 
10.19

Outstanding at December 31, 2017
307

 
9.84

Units forfeited
(3
)
 
9.91

Outstanding at March 31, 2018
304

 
$
9.84