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STOCK-BASED PLANS (Tables)
 6 Months Ended
Jun. 30, 2020
Share-based Payment Arrangement [Abstract]  
Summary of stock option plan activity
The following table summarizes the Company’s stock option activity for the six months ended June 30, 2020:
 
 
Stock
Options
 
Weighted-average
Exercise Price
Stock Options outstanding at December 31, 2019
 
721,496

 
$
104.55

Granted
 
2,000

 
83.11

Exercised
 
(57,058
)
 
67.24

Forfeited
 
(125,500
)
 
124.24

Expired
 
(22,188
)
 
100.08

Stock Options outstanding at June 30, 2020
 
518,750

 
$
104.01
Summary of restricted stock activity
The following table summarizes restricted stock activity for the six months ended June 30, 2020:
 
 
Restricted
Stock
 
Weighted-average Grant
Date Fair Value
Restricted stock outstanding at December 31, 2019
 
406,802

 
$
76.27

Granted
 
70,210

 
84.55

Vested
 
(13,729
)
 
101.24

Forfeited
 
(23,000
)
 
94.83

Restricted stock outstanding at June 30, 2020
 
440,283

 
$
75.73