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Stock-Based Compensation (Tables)
 12 Months Ended
Dec. 31, 2020
Stock-Based Compensation [Abstract]  
Unvested Restricted Stock Units Activity
The Company has outstanding restricted stock granted from various plans at December 31, 2020. The Company recognized $4.6 million, $4.2 million and $3.9 million in stock-based compensation expense related to these stock awards for the years ended December 31, 2020, 2019 and 2018, respectively. Tax benefits recognized with respect to restricted stock awards and stock units were $1.0 million, $1.1 million and $1.2 million for the years ended December 31, 2020, 2019 and 2018, respectively. Unrecognized compensation cost related to restricted stock units totaled $5.1 million at December 31, 2020 and will be recognized over 1.5 years on a weighted average basis. Shares issued are funded from the Company’s treasury stock. The following table summarizes information for unvested restricted stock units outstanding as of December 31, 2020:

  
Number
of Shares
    
Weighted-
Average Grant
Date Fair Value
  
Unvested at January 1, 2020
    
555,440
    
$
30.11
  
Forfeited
    
(2,315
)
    
34.82
  
Vested
    
(115,432
)
    
29.93
  
Granted
    
147,562
      
28.61
  
Unvested at December 31, 2020
    
585,255
    
$
29.78
  
Stock Option Activity
The following table summarizes information concerning stock options outstanding:

(In thousands, except share and per share data)
  
Number
of Shares
    
Weighted
Average
Exercise Price
    
Weighted Average
Remaining
Contractual Term
(in Years)
    
Aggregate
Intrinsic
Value
  
Outstanding at January 1, 2020
    
33,145
    
$
23.73
              
Exercised
    
(8,845
)
    
20.87
              
Expired
    
(10,500
)
    
20.74
              
Outstanding at December 31, 2020
    
13,800
    
$
27.83
      
3.36
    
$
75
  
                                 
Exercisable at December 31, 2020
    
13,800
    
$
27.83
      
3.36
    
$
75
  
Cash Proceeds, Tax Benefits and Intrinsic Value of Stock Options Exercised
There was no stock-based compensation expense for stock option awards for the year ended December 31, 2020. Total stock-based compensation expense for stock option awards totaled $1 thousand and $11 thousand for the years ended December 31, 2019 and 2018, respectively. Cash proceeds, tax benefits and intrinsic value related to total stock options exercised is as follows: 

  
Years Ended December 31,
  
(In thousands)
  
2020
    
2019
    
2018
  
Proceeds from stock options exercised
  
$
185
    
$
725
    
$
999
  
Tax benefits related to stock options exercised
    
41
      
123
      
173
  
Intrinsic value of stock options exercised
    
165
      
490
      
692
  
Fair value of shares vested during the year
    
-
      
13
      
16