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Stock Incentive Plan (Tables)
12 Months Ended
Dec. 31, 2019
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Compensation cost, net of forfeitures, related to stock-based compensation
The following table summarizes the compensation cost, net of forfeitures, related to stock-based compensation for the years ended December 31, 2019, 2018 and 2017 (in thousands):
 
 
2019
 
2018
 
2017
Stock and stock unit awards:
 
 
 
 
 
 
Pre-tax compensation expense
 
$
453

 
$
314

 
$
954

Income tax benefit
 
(95
)
 
(66
)
 
(334
)
Total share-based compensation expense, net of income taxes
 
$
358

 
$
248

 
$
620

Summary of option activity
A summary of option activity under the 1997 Stock Incentive Plan as of December 31, 2018 and 2017, and changes during the years then ended is presented below:
 
 
2018
 
 
Shares
 
Weighted-Average
Exercise Price
 
Weighted-Average
Remaining
Contractual Term
 
Aggregate
Intrinsic Value
Outstanding, beginning of year
 
10,500
 
$23.00
 
 
 
 
Granted
 
0
 
0.00
 
 
 
 
Exercised
 
(10,500)
 
23.00
 
 
 
 
Forfeited or expired
 
0
 
0.00
 
 
 
 
Outstanding, end of year
 
0
 
$0.00
 
0.00
 
$

Exercisable, end of year
 
0
 
$0.00
 
0.00
 
$



The total intrinsic value of options exercised during 2018 was $176,000. There were no stock options for shares of common stock not considered in computing the aggregate intrinsic value of outstanding shares and exercisable shares for 2018 because they were anti-dilutive.

 
 
2017
 
 
Shares
 
Weighted-Average
Exercise Price
 
Weighted-Average
Remaining
Contractual Term
 
Aggregate
Intrinsic Value
Outstanding, beginning of year
 
40,500
 
$24.65
 
 
 
 
Granted
 
0
 
0.00
 
 
 
 
Exercised
 
(27,500)
 
25.42
 
 
 
 
Forfeited or expired
 
(2,500)
 
23.00
 
 
 
 
Outstanding, end of year
 
10,500
 
$23.00
 
0.96
 
$
163,170

Exercisable, end of year
 
10,500
 
$23.00
 
0.96
 
$
163,170



Schedule of Unvested Restricted Stock and Restricted Stock Units Roll Forward [Table Text Block]
The following table summarizes non-vested stock and stock unit activity for the years ended December 31, 2019, 2018 and 2017:

 
 
2019
 
2018
 
2017
 
 
Shares
 
Weighted-avg Grant-date Fair Value
 
Shares
 
Weighted-avg Grant-date Fair Value
 
Shares
 
Weighted-avg Grant-date Fair Value
Nonvested, beginning of year
 
24,280
 
$38.92
 
0
 
$0.00
 
32,338
 
$22.64
Granted
 
26,700
 
33.31
 
28,700
 
38.92
 
18,391
 
30.65
Vested
 
(13,072)
 
37.42
 
(4,420)
 
38.92
 
(50,729)
 
25.54
Forfeited
 
0
 
0.00
 
0
 
0.00
 
0
 
0.00
Nonvested, end of year
 
37,908
 
$35.49
 
24,280
 
$38.92
 
0
 
$0.00
Fair value of shares vested
 
 
 
$
489,110

 
 
 
$
172,026

 
 
 
$
260,483