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Stock Compensation Plans (Tables) | 12 Months Ended
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Dec. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Schedule of Valuation Assumptions Used to Determine Fair Value |
| 2018
Risk free interest rate | 2.34 | %
Dividend yield | — | %
Volatility factor of the expected market price of the common shares | 0.37 |
Expected term (in years) | 2.83 |
Correlation coefficient | 0.43 |
The weighted average assumptions used in the determination of fair value for stock option awards were as follows:
| 2015
Risk free interest rate | 1.80 | %
Dividend yield | 1.58 | %
Volatility factor of the expected market price of the common shares | 0.35 |
Expected life for the options (in years) | 5.50 |
Schedule of Reconciliation of Options Outstanding | A reconciliation of the number of Options outstanding and exercisable under the 2014 LT Plan as of December 31, 2018, and changes during the period then ended, is as follows:
| Shares (in thousands) |  | Weighted- Average Exercise Price |  | Weighted- Average Remaining Contractual Term |  | Aggregate Intrinsic Value (000's)
Options outstanding at January 1, 2018 | 325 |  |  | $ | 35.40 |  |  |  |  |
Options granted | — |  |  | — |  |  |  |  |
Options exercised |  |  |  | — |  |  |  |  |
Options cancelled / forfeited | — |  |  | — |  |  |  |  |
Options outstanding at December 31, 2018 | 325 |  |  | $ | 35.40 |  |  | — |  |  | $ | — |
Vested and expected to vest at December 31, 2018 | 325 |  |  | $ | 35.40 |  |  | — |  |  | $ | — |
Options exercisable at December 31, 2018 | 325 |  |  | $ | 35.40 |  |  | — |  |  | $ | — |
Schedule of Options Granted and Exercised |
| Year ended December 31,
(in thousands) | 2018
Total intrinsic value of Options exercised | $ | — |
Total fair value of shares vested | $ | 1,123 |
Weighted average fair value of Options granted | $ | — |
Schedule of Nonvested Restricted Shares | A summary of the status of the Company's non-vested restricted shares as of December 31, 2018, and changes during the period then ended, is presented below:
| Shares (in thousands) |  | Weighted-Average Grant-Date Fair Value
Non-vested restricted shares at January 1, 2018 | 229 |  |  | $ | 34.22 |
Granted | 133 |  |  | 34.36 |
Vested | (137 | ) |  | 34.25 |
Forfeited | (7 | ) |  | 35.23 |
Non-vested restricted shares at December 31, 2018 | 218 |  |  | $ | 34.25 |
| Year ended December 31,
| 2018 |  | 2017 |  | 2016
Total fair value of shares vested (000's) | $ | 4,681 |  |  | $ | 3,751 |  |  | $ | 4,038 |
Weighted average fair value of restricted shares granted | $ | 34.36 |  |  | $ | 37.13 |  |  | $ | 27.20 |
Schedule of Nonvested PSUs | A summary of the status of the Company's PSUs as of December 31, 2018, and changes during the period then ended, is presented below:
| Shares (in thousands) |  | Weighted-Average Grant-Date Fair Value
Non-vested at January 1, 2018 | 183 |  |  | $ | 33.26 |
Granted | 97 |  |  | 46.51 |
Vested | — |  |  | — |
Forfeited | (33 | ) |  | 36.57 |
Non-vested at December 31, 2018 | 247 |  |  | $ | 38.02 |
| Year ended December 31,
| 2018 |  | 2017 |  | 2016
Weighted average fair value of PSUs granted | $ | 46.51 |  |  | $ | 42.53 |  |  | $ | 26.43 |
A summary of the status of the Company's EPS PSUs as of December 31, 2018, and changes during the period then ended, is presented below:
| Shares (in thousands) |  | Weighted-Average Grant-Date Fair Value
Non-vested at January 1, 2018 | 275 |  |  | $ | 36.61 |
Granted | 97 |  |  | 35.36 |
Vested | — |  |  | — |
Forfeited | (125 | ) |  | 41.85 |
Non-vested at December 31, 2018 | 247 |  |  | $ | 33.47 |
| Year ended December 31,
| 2018 |  | 2017 |  | 2016
Weighted average fair value of PSUs granted | $ | 35.36 |  |  | $ | 39.20 |  |  | $ | 27.54 |
Schedule of Fair Value of the Option Component of the ESP Plan |
| 2018 |  | 2017 |  | 2016
Risk free interest rate | 2.57 | % |  | 1.76 | % |  | 0.61 | %
Dividend yield | 2.23 | % |  | 2.06 | % |  | 1.96 | %
Volatility factor of the expected market price of the common shares | 0.33 |  |  | 0.28 |  |  | 0.36 |
Expected life for the options (in years) | 1.00 |  |  | 1.00 |  |  | 1.00 |

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