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Stock Compensation Plans (Tables) | 12 Months Ended
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Dec. 31, 2020
Share-based Payment Arrangement [Abstract] |
Schedule of Nonvested Restricted Shares | A summary of the status of the Company's non-vested RSAs as of December 31, 2020, and changes during the period then ended, is presented below:
| Shares (in thousands) |  | Weighted-Average Grant-Date Fair Value
Non-vested at January 1, 2020 | 707 |  |  | $ | 34.99 |
Granted | 284 |  |  | 18.35 |
Vested | (413) |  |  | 32.68 |
Forfeited | (11) |  |  | 25.94 |
Non-vested at December 31, 2020 | 567 |  |  | $ | 28.50 |
| Year ended December 31,
| 2020 |  | 2019 |  | 2018
Total fair value of shares vested (in thousands) | $ | 13,510 |  |  | $ | 8,225 |  |  | $ | 4,681 |
Weighted average fair value of RSAs granted | $ | 18.35 |  |  | $ | 33.87 |  |  | $ | 34.36 |
Schedule of Nonvested PSUs | A summary of the status of the Company's EPS PSUs as of December 31, 2020, and changes during the period then ended, is presented below:
| Shares (in thousands) |  | Weighted-Average Grant-Date Fair Value
Non-vested at January 1, 2020 | 263 |  |  | $ | 32.58 |
Granted | 203 |  |  | 19.06 |
Vested | — |  |  | — |
Forfeited | (122) |  |  | 32.71 |
Non-vested at December 31, 2020 | 344 |  |  | $ | 24.58 |
| Year ended December 31,
| 2020 |  | 2019 |  | 2018
Weighted average fair value of EPS PSUs granted | $ | 19.06 |  |  | $ | 27.23 |  |  | $ | 35.36 |
A summary of the status of the Company's TSR PSUs as of December 31, 2020, and changes during the period then ended, is presented below:
| Shares (in thousands) |  | Weighted-Average Grant-Date Fair Value
Non-vested at January 1, 2020 | 263 |  |  | $ | 46.85 |
Granted | 203 |  |  | 16.80 |
Vested | — |  |  | — |
Forfeited | (122) |  |  | 39.32 |
Non-vested at December 31, 2020 | 344 |  |  | $ | 31.83 |
| Year ended December 31,
| 2020 |  | 2019 |  | 2018
Weighted average fair value of TSR PSUs granted | $ | 16.80 |  |  | $ | 49.20 |  |  | $ | 46.51 |
Schedule of Valuation Assumptions Used to Determine Fair Value |
| 2020
Risk free interest rate | 0.85%
Dividend yield | —%
Volatility factor of the expected market price of the common shares | 33%
Expected term (in years) | 2.83
Correlation coefficient | 0.43
Schedule of Fair Value of the Option Component of the ESP Plan |
| Year ended December 31,
| 2020 |  | 2019 |  | 2018
Risk free interest rate | 1.59 | % |  | 1.59 | % |  | 2.57 | %
Dividend yield | 2.71 | % |  | 2.27 | % |  | 2.23 | %
Volatility factor of the expected market price of the common shares | 36 | % |  | 36 | % |  | 33 | %
Expected life for the options (in years) | 1.0 |  | 1.0 |  | 1.0

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- Definition Schedule of share based payment award employee share purchase plan valuation assumptions. + References No definition available. + Details
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- Definition Share based compensation arrangement by share based payment award equity instruments other than options nonvested performance share units. + References No definition available. + Details
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- Definition Share based compensation arrangement by share based payment award equity instruments other than options nonvested. + References No definition available. + Details
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- References No definition available. + Details
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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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