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STOCK-BASED COMPENSATION (Tables) | 3 Months Ended
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Mar. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Schedule of Assumption Used and Resulting Weighted Average Fair Value of Stock Option Granted | The grant date fair value of each option award is calculated using a lattice option-pricing valuation model, which incorporates a range of assumptions for inputs as follows:
| Three Months Ended March 2018
Expected volatility | 24% to 29%
Weighted average expected volatility | 25%
Expected term (in years) | 6.1 to 7.6
Weighted average dividend yield | 2.9%
Risk-free interest rate | 1.9% to 2.9%
Weighted average fair value at date of grant | $15.34

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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=96867065&loc=d3e5070-113901 + Details
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