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Stock-Based Compensation Plans (Tables)
12 Months Ended
Dec. 31, 2019
Share-based Payment Arrangement, Noncash Expense [Abstract]  
Schedule of components of stock compensation expense
The components of stock compensation expense were as follows:
 
Year Ended December 31,
 
2019
 
2018
 
(in thousands)
2007 Stock Incentive Plan
$
4,584

 
$
5,353

2018 Stock Incentive Plan
3,117

 

Employee Stock Purchase Plan
86

 
57

Total Stock Compensation Expense
$
7,787

 
$
5,410


Summary of restricted stock activity
The following table summarizes restricted stock activity under the 2007 and 2018 Plans for the years ended December 31, 2019 and 2018:
 
Number Outstanding
 
Weighted Average
Grant Date Fair Value
 
Aggregate Grant
Date Fair Value
(in thousands)
Balance as of December 31, 2017
328,122

 
$
23.49

 
$
7,707

Shares granted
270,454

 
33.91

 
9,172

Shares forfeited
(9,900
)
 
32.06

 
(317
)
Shares vested
(170,786
)
 
22.25

 
(3,799
)
Balance as of December 31, 2018
417,890

 
30.54

 
12,763

Shares granted
279,400

 
42.28

 
11,813

Shares forfeited
(3,866
)
 
30.43

 
(118
)
Shares vested
(187,957
)
 
28.74

 
(5,402
)
Balance as of December 31, 2019
505,467

 
$
37.70

 
$
19,056