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SHARE-BASED COMPENSATION (Tables)
 12 Months Ended
Dec. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Summary of the effects of share-based compensation to options and awards granted under the Company's equity incentive plans
The following table summarizes the effects of share-based compensation for options and awards granted under the Company's equity incentive plans for each of the periods presented:
 
 
Year Ended December 31,
 
2017
 
2016
 
2015
 
(Dollars in thousands)
Salaries and employee benefits
$
3,266

 
$
3,094

 
$
4,181

Directors stock awards
150

 
97

 
78

Income tax benefit
(1,903
)
 
(1,269
)
 
(1,694
)
Net share-based compensation effect
$
1,513

 
$
1,922

 
$
2,565
Summary of option activity for stock option plans
The following is a summary of option activity for our stock option plans for the year ended December 31, 2017:
 
 
Number
of Units
 
Weighted
Average
Exercise
Price
 
Weighted
Average
Remaining
Contractual
Term
(in years)
 
Aggregate
Intrinsic
Value
(in thousands)
Stock options outstanding as of January 1, 2017
162,063

 
$
24.95

 
 
 
 
Changes during the year:


 


 
 
 
 
Granted
—

 
—

 
 
 
 
Exercised
—

 
—

 
 
 
 
Expired
(1,175
)
 
706.54

 
 
 
 
Forfeited
(629
)
 
210.50

 
 
 
 
Stock options outstanding as of December 31, 2017
160,259

 
$
19.22

 
4.2
 
$
2,410

 
 
 
 
 
 
 
 
Vested and exercisable as of December 31, 2017
160,259

 
$
19.22

 
4.2
 
$
2,410
Schedule of activity of restricted stock awards and units
The table below presents the activity of restricted stock awards and units for each of the periods presented:
 
 
Number
of Units
 
Weighted
Average
Grant Date
Fair Value
 
Fair Value
of Restricted
Stock Awards
and Units That
Vested During
The Year
(in thousands)
Unvested as of December 31, 2014
715,460

 
$
15.77

 
 
 
 
 
 
 
 
Changes during the year:
 
 
 
 
 
Granted
173,897

 
19.50

 
 
Forfeited
(82,373
)
 
16.73

 
 
Vested
(343,067
)
 
15.21

 
$
7,888

Unvested as of December 31, 2015
463,917

 
17.41

 
 
 
 
 
 
 
 
Changes during the year:
 
 
 
 
 
Granted
296,078

 
23.65

 
 
Forfeited
(66,972
)
 
20.97

 
 
Vested
(255,326
)
 
15.83

 
5,806

Unvested as of December 31, 2016
437,697

 
22.01

 
 
 
 
 
 
 
 
Changes during the year:
 

 
 

 
 
Granted
126,204

 
31.35

 
 
Forfeited
(31,570
)
 
24.89

 
 
Vested
(134,780
)
 
19.81

 
4,224

Unvested as of December 31, 2017
397,551

 
25.49