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STOCK OPTIONS (Tables)
 6 Months Ended
Jun. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Summary of stock option activity
The following table summarizes stock option activity under our plans during the six months ended June 30, 2017:
 
 
Number of
Options
 
Weighted-Average
Exercise Price
Outstanding at January 1, 2017
24,600

 
$
107.83

Granted
—

 
—

Forfeited
(2,460
)
 
75.76

Outstanding at June 30, 2017
22,140

 
$
111.39

Exercisable at June 30, 2017
19,908

 
$
119.13