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Employee Stock Benefit Plans (Tables)
 12 Months Ended
Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Abstract]  
Award Activity
The following table summarizes award activity for the current fiscal year:
 
 
Stock Options
 
Stock and RSUs
 
 
Shares
 
Weighted-average Exercise Price
(per share)
 
Shares / Units
 
Weighted-average Grant Date Fair Value
(per share)
Outstanding balance at December 31, 2017
 
762,550

 
$
16.91

 
354,204

 
$
15.30

Granted
 
—

 
 
 
596,688

 
$
5.50

Exercised or vested
 
(5,300
)
 
$
1.01

 
(200,612
)
 
$
13.04

Forfeited or expired
 
(166,678
)
 
$
17.74

 
(57,351
)
 
$
13.53

Outstanding balance at December 31, 2018
 
590,572

 
$
16.82

 
692,929

 
$
7.66

Exercisable at December 31, 2018
 
344,233

 
$
18.94

 
 
 
 
Schedule of Award Expensing and Fair Value Information
The following table summarizes award expensing and fair value information for the periods presented:
Year ended December 31,
(dollars in thousands, except grant date fair values and assumptions)
 
2018
 
2017
Total stock compensation expense
 
$
2,827

 
$
3,460

Total fair value of stock, stock options and RSUs vested
 
$
3,371

 
$
2,643

Weighted average grant date fair value of stock options granted
 
Not applicable
 
$
3.00

Weighted average grant date fair value of stock and RSUs granted
 
$
5.50

 
$
10.38

Intrinsic value of stock options exercised
 
$
38

 
$
17

Intrinsic value of stock and RSUs vested
 
$
1,230

 
$
1,918

 
 
 
 
 
Weighted-average assumptions for stock option grants:
 
 
 
 
Risk-free interest
 
Not applicable
 
2.07
%
Expected term
 
Not applicable
 
5.8 years

Expected volatility
 
Not applicable
 
38.54
%
Dividend yield
 
Not applicable
 
4.32
%