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STOCK-BASED COMPENSATION PLANS (Tables)
6 Months Ended
Jun. 30, 2019
Share-based Payment Arrangement [Abstract]  
Summary of Activity in the Stock Award and Stock Option Plans

A combined summary of activity in the Company’s stock award and stock option plans for the six months ended June 30, 2019 is presented in the following table:
 
 
 
Non-Vested Stock Awards Outstanding
 
Stock Options Outstanding
(Shares in thousands)
 
 
Number of Shares
 
Weighted-Average Grant Date Fair Value
 
Number of Shares
 
Weighted-Average Exercise Price
December 31, 2018
 
 
371

 
$
33.63

 
31

 
$
10.82

Granted
 
 
131

 
27.91

 

 

Acquired
 
 

 

 
133

 
23.99

Stock options exercised
 
 

 

 
(1
)
 
13.70

Stock awards vested
 
 
(127
)
 
31.73

 

 

Forfeited
 
 
(51
)
 
33.22

 

 

Expired
 
 

 

 

 

June 30, 2019
 
 
324

 
$
32.76

 
163

 
$
21.15

Exercisable options at June 30, 2019
 
163

 
$
21.15