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STOCK COMPENSATION PLANS | 3 Months Ended
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Mar. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
STOCK COMPENSATION PLANS | NOTE 8 - STOCK COMPENSATION PLANS Employees’ Plans The Compensation and Organization Committee of the Board of Directors approved grants under the 2012 Amended Equity Plan to certain officers and employees for the 2015 to 2017 performance period. Shares granted under the awards during 2015 consisted of 0.9 million performance shares based on TSR, 0.9 million restricted share units and 0.4 million stock options, each of which may or may not convert into shares based on our shares achieving and maintaining certain milestones above an absolute threshold during the performance period. For the outstanding 2012 Equity Plan awards that were issued subsequent to October 2013 and the 2012 Amended Equity Plan awards, each performance share, if earned, entitles the holder to receive common shares or cash within a range between a threshold and maximum number of our common shares, with the actual number of common shares earned dependent upon whether the Company achieves certain objectives and performance goals as established by the Compensation and Organization Committee. The performance share or unit grants vest over a period of three years and are intended to be paid out in common shares or cash in certain circumstances. Performance for the 2015 to 2017 performance period is measured on the basis of relative TSR for the period and measured against the constituents of the S&P Metals and Mining ETF Index on the last day of trading of the performance period. The final payouts for the 2015 to 2017 performance period grants will vary from zero to 200 percent of the original grant. The restricted share units are subject to continued employment, are retention based, will vest in equal thirds on each of December 31, 2015, December 31, 2016 and December 31, 2017, and are payable in common shares or cash in certain circumstances at a time determined by the Committee at its discretion. The stock options vest on December 31, 2017, subject to continued employment through the vesting date, are exercisable at a strike price of $7.70 after the vesting date and expire on January 12, 2025. Determination of Fair Value The fair value of each performance share grant is estimated on the date of grant using a Monte Carlo simulation to forecast relative TSR performance. A correlation matrix of historic and projected stock prices was developed for both the Company and our predetermined peer group of mining and metals companies. The fair value assumes that performance goals will be achieved. The expected term of the grant represents the time from the grant date to the end of the service period for each of the three plan-year agreements. We estimate the volatility of our common shares and that of the peer group of mining and metals companies using daily price intervals for all companies. The risk-free interest rate is the rate at the grant date on zero-coupon government bonds, with a term commensurate with the remaining life of the performance period. The following assumptions were utilized to estimate the fair value for the first quarter of 2015 performance share grants:
Grant Date |  | Grant Date Market Price |  | Average Expected Term (Years) |  | Expected Volatility |  | Risk-Free Interest Rate |  | Dividend Yield |  | Fair Value |  | Fair Value (Percent of Grant Date Market Price)
January 12, 2015 |  | $ | 7.70 |  |  | 2.97 |  | 58.3% |  | 0.91% |  | —% |  | $ | 11.56 |  |  | 150.13%
February 9, 2015 |  | $ | 6.57 |  |  | 2.89 |  | 58.3% |  | 0.87% |  | —% |  | $ | 9.86 |  |  | 150.13%
The fair value of each stock option grant is estimated on the date of grant using a Black-Scholes valuation model. The expected term of the option grant is determined using the simplified method. We estimate the volatility of our common shares using historical stock prices with consistent frequency over the most recent historical period equal to the option’s expected term. The risk-free interest rate is the rate at the grant date on zero-coupon government bonds, with a term commensurate with the expected term. The following assumptions were utilized to estimate the fair value for the first quarter of 2015 stock option grants:
Grant Date |  | Grant Date Market Price |  | Average Expected Term (Years) |  | Expected Volatility |  | Risk-Free Interest Rate |  | Dividend Yield |  | Fair Value
January 12, 2015 |  | $ | 7.70 |  |  | 6.47 |  | 75.3% |  | 1.60% |  | —% |  | $ | 5.23 |
The fair value of the restricted share units is determined based on the closing price of our common shares on the grant date. The restricted share units granted under either the 2012 Equity Plan or the 2012 Amended Equity Plan generally vest over a period of three years.

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- Definition The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 50 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6406099&loc=d3e25284-112666 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 40 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6418621&loc=d3e17540-113929 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5444-113901 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 + Details
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