Annual report pursuant to Section 13 and 15(d)

EQUITY AND EARNINGS PER SHARE EQUITY AND EARNINGS PER SHARE - Changes in Outstanding Options (Details)

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EQUITY AND EARNINGS PER SHARE EQUITY AND EARNINGS PER SHARE - Changes in Outstanding Options (Details)
12 Months Ended
Dec. 31, 2017
$ / shares
shares
Number of Options  
Beginning Balance (in shares) | shares 5,126,906
Expired (in shares) | shares (116,330)
Ending Balance (in shares) | shares 5,010,576
Weighted Average Strike Price  
Beginning Balance (in dollars per share) | $ / shares $ 2.79
Expired (in dollars per share) | $ / shares 13.13
Ending Balance (in dollars per share) | $ / shares $ 2.55
Weighted Average Life Remaining  
Exercisable, Number of Options (in shares) | shares 3,858,081
Exercisable, Weighted Average Strike Price (in shares) | $ / shares $ 2.58
Weighted Average Life Remaining (in years) 5 years 7 months 1 day
Weighted Average Life Remaining (in years), Exercisable 5 years 7 months 10 days