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STOCK-BASED COMPENSATION PLANS (Tables)
 3 Months Ended
Mar. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [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 three months ended March 31, 2018 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, 2017
 
 
418

 
$
29.68

 
76

 
$
13.59

Granted
 
 
92

 
37.67

 
—

 
—

Stock options exercised
 
 
—

 
—

 
(5
)
 
14.27

Stock awards vested
 
 
(87
)
 
27.92

 
—

 
—

Forfeited
 
 
(4
)
 
30.50

 
—

 
—

Expired
 
 
—

 
—

 
(11
)
 
22.61

March 31, 2018
 
 
419

 
$
32.41

 
60

 
$
10.56

Exercisable options at March 31, 2018
 
60

 
$
10.56