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SHARE-BASED COMPENSATION PLANS AND AWARDS (Tables) | 12 Months Ended
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Dec. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Schedule of Assumptions Used in the Determination of Fair Value of Stock Options Awarded | The weighted average assumptions used in the determination of fair value for stock options awarded in 2018, 2017, and 2016 are provided in the table below:
Assumptions |  | 2018 |  | 2017 |  | 2016
Expected volatility rate |  | 19.03% |  | 20.45% |  | 23.71%
Expected dividend yield |  | 2.48% |  | 2.64% |  | 2.31%
Average risk-free interest rate |  | 2.61% |  | 1.91% |  | 1.23%
Expected term years |  | 5.1 |  | 5.0 |  | 5.0
Schedule of Activity of Stock Option Awards | A summary of the activity of the Company's stock option awards for 2018, 2017, and 2016 is presented below:
| 2018 |  | 2017 |  | 2016
| Options |  | Weighted-Average Exercise Price |  | Options |  | Weighted-Average Exercise Price |  | Options |  | Weighted-Average Exercise Price
Outstanding at beginning of year | 2,614,100 |  |  | $ | 70 |  |  | 2,363,700 |  |  | $ | 61 |  |  | 2,434,600 |  |  | $ | 53 |
Granted | 619,700 |  |  | 104 |  |  | 745,800 |  |  | 80 |  |  | 554,000 |  |  | 65 |
Exercised | (323,000 | ) |  | 55 |  |  | (489,300 | ) |  | 44 |  |  | (618,500 | ) |  | 33 |
Cancelled, forfeited, or expired | (5,200 | ) |  | 78 |  |  | (6,100 | ) |  | 74 |  |  | (6,400 | ) |  | 77 |
Outstanding at end of year | 2,905,600 |  |  | $ | 79 |  |  | 2,614,100 |  |  | $ | 70 |  |  | 2,363,700 |  |  | $ | 61 |
Options exercisable at year-end | 1,606,800 |  |  |  |  | 1,335,500 |  |  |  |  | 1,378,000 |  |  |
Available for grant at end of year | 8,174,614 |  |  |  |  | 9,943,033 |  |  |  |  | 3,807,724 |  |  |
Schedule of Remaining Contractual Term and Weighted Average Exercise Price of Stock Options Outstanding and Exercisable | The following table provides the remaining contractual term and weighted average exercise prices of stock options outstanding and exercisable at December 31, 2018:
|  | Options Outstanding |  | Options Exercisable
Range of Exercise Prices |  | Number Outstanding at December 31, 2018 |  | Weighted-Average Remaining Contractual Life (Years) |  | Weighted-Average Exercise Price |  | Number Exercisable at December 31, 2018 |  | Weighted-Average Exercise Price
$38-$50 |  | 182,500 |  | 2.5 |  | $ | 39 |  |  | 182,500 |  | $ | 39 |
$51-$73 |  | 742,300 |  | 6.2 |  | 67 |  |  | 557,500 |  | 67 |
$74-$89 |  | 1,361,100 |  | 7.1 |  | 80 |  |  | 866,800 |  | 79 |
$90-$104 |  | 619,700 |  | 9.2 |  | 104 |  |  | 0 | — |  | — |
|  | 2,905,600 |  | 7.0 |  | $ | 79 |  |  | 1,606,800 |  | $ | 70 |
Schedule of Summary of Status of Nonvested Options | A summary of the changes in the Company's nonvested options during the year ended December 31, 2018 is presented below:
Nonvested Options |  | Number of Options |  | Weighted-Average Grant Date Fair Value
Nonvested at January 1, 2018 |  | 1,278,600 |  |  | $11.82
Granted |  | 619,700 |  |  | $15.90
Vested |  | (594,300 | ) |  | $12.10
Forfeited or expired |  | (5,200 | ) |  | $12.74
Nonvested options at December 31, 2018 |  | 1,298,800 |  |  | $13.63

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