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STOCK-BASED COMPENSATION (Tables) | 9 Months Ended
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Sep. 30, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Fair Value of Employee Stock Options Granted and Determined by Black-Scholes Valuation Model Assumptions | The weighted average fair value of our employee stock options granted, as determined by the Black-Scholes valuation model, was $14.09 for the third quarter 2016 award, $17.32 for the first quarter 2016 award and $18.07 for the 2015 award using the following assumptions:
| Q3 2016 |  | Q1 2016 |  | 2015
Expected life (in years) | 7.5 |  |  | 7.5 |  |  | 7.5 |
Risk-free interest rate | 1.50 | % |  | 1.66 | % |  | 2.07 | %
Expected volatility | 19.10 | % |  | 23.60 | % |  | 20.61 | %
Expected dividend yield | 2.97 | % |  | 2.94 | % |  | 2.63 | %

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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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