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Benefit Plans (Tables)
 12 Months Ended
Dec. 31, 2019
Retirement Benefits [Abstract]  
Summary of the activity in the Option Plan Below is a summary of the stock option activity in the Plans for the year ended December 31, 2019:
 
2019
 
Number of Stock Options Outstanding
 
Weighted Average Exercise Price Per Share
 
Weighted Average Remaining Contractual Term
 
Aggregate Intrinsic value
 
 
 
 
 
(in years)
 
(dollars in thousands)
Outstanding at January 1, 2019
681,933

 
$
15.26

 
 
 
 
Granted
—

 
—

 
 
 
 
Exercised
(220,118
)
 
13.17

 
 
 
 
Forfeited and expired
(8,711
)
 
15.84

 
 
 
 
Outstanding at December 31, 2019
453,104

 
$
16.26

 
4.66
 
$
7,401

Vested and exercisable at December 31, 2019
451,424

 
$
16.24

 
4.66
 
$
7,382
Schedule of Other Share-based Compensation, Activity
Below is a summary of the activity for restricted stock and restricted stock units in the Plans for the years ended December 31, 2019:
 
2019
 
Shares
 
Weighted Average Grant-Date Fair Value Per Share
Unvested at the beginning of the year
636,077

 
$
35.98

Granted
423,823

 
29.92

Vested
(287,754
)
 
29.43

Forfeited
(32,213
)
 
34.76

Unvested at the end of the year
739,933

 
$
35.11