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Stock Compensation Plans (Tables) | 12 Months Ended
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Dec. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Summary of stock options outstanding and exercisable under long-term performance compensation plan | A summary of activity related to SOSARs is included below:
| Year ended December 31,
(in thousands) | 2016 |  | 2015 |  | 2014
Total intrinsic value of SOSARs exercised | $ | — |  |  | $ | — |  |  | $ | 5,193 |
Total fair value of shares vested | $ | — |  |  | $ | — |  |  | $ | — |
Summary of valuation assumptions |
| 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 |
| 2016
Risk free interest rate | 0.96 | %
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 |
Schedule of stock options rollforward | A reconciliation of the number of Options outstanding and exercisable under the 2014 LT Plan as of December 31, 2016, and changes during the period then ended is as follows:
| Shares (000's) |  | Weighted- Average Exercise Price |  | Weighted- Average Remaining Contractual Term |  | Aggregate Intrinsic Value (000's)
Options outstanding at January 1, 2016 | 325 |  |  | $ | 35.40 |  |  |  |  |
Options granted | — |  |  | — |  |  |  |  |
Options exercised | — |  |  | — |  |  |  |  |
Options cancelled / forfeited | — |  |  | — |  |  |  |  |
Options outstanding at December 31, 2016 | 325 |  |  | $ | 35.40 |  |  | 5.84 |  | $ | 3,023 |
Vested and expected to vest at December 31, 2016 | 323 |  |  | $ | 35.40 |  |  | 5.84 |  | $ | 3,002 |
Options exercisable at December 31, 2016 | 108 |  |  | $ | 35.40 |  |  | 5.84 |  | $ | 1,008 |
Summary of stock options |
| Year ended December 31,
(in thousands) | 2016
Total intrinsic value of Options exercised | $ | — |
Total fair value of shares vested | $ | 1,123 |
Weighted average fair value of Options granted | $ | — |
Summary of nonvested restricted shares | A summary of the status of the Company's non-vested restricted shares as of December 31, 2016, and changes during the period then ended, is presented below:
| Shares (000)'s |  | Weighted-Average Grant-Date Fair Value
Non-vested restricted shares at January 1, 2016 | 151 |  |  | $ | 44.99 |
Granted | 177 |  |  | 27.20 |
Vested | (92 | ) |  | 43.61 |
Forfeited | (13 | ) |  | 36.45 |
Non-vested restricted shares at December 31, 2016 | 223 |  |  | $ | 31.93 |
| Year ended December 31,
| 2016 |  | 2015 |  | 2014
Total fair value of shares vested (000's) | $4,038 |  | $4,918 |  | $1,585
Weighted average fair value of restricted shares granted | $27.20 |  | $42.32 |  | $54.84
Summary of nonvested performance share units | A summary of the status of the Company's EPS PSUs as of December 31, 2016, and changes during the period then ended, is presented below:
| Shares (000)'s |  | Weighted-Average Grant-Date Fair Value
Non-vested at January 1, 2016 | 311 |  |  | $ | 48.53 |
Granted | 130 |  |  | 27.54 |
Vested | — |  |  | — |
Forfeited | (137 | ) |  | 45.9 |
Non-vested at December 31, 2016 | 304 |  |  | $ | 40.76 |
| Year ended December 31,
| 2016 |  | 2015 |  | 2014
Weighted average fair value of PSUs granted | $27.54 |  | $44.76 |  | $54.84
A summary of the status of the Company's PSUs as of December 31, 2016, and changes during the period then ended, is presented below:
| Shares (000)'s |  | Weighted-Average Grant-Date Fair Value
Non-vested at January 1, 2016 | — |  |  | $ | — |
Granted | 130 |  |  | 26.43 |
Vested | — |  |  | — |
Forfeited | (12 | ) |  | 26.43 |
Non-vested at December 31, 2016 | 118 |  |  | $ | 26.43 |
| Year ended December 31,
| 2016 |  | 2015 |  | 2014
Weighted average fair value of PSUs granted | $ | 26.43 |  |  | $— |  | $—
Fair value of the option component of the ESP Plan |
| 2016 |  | 2015 |  | 2014
Risk free interest rate | 0.61 | % |  | 0.25 | % |  | 0.13 | %
Dividend yield | 1.96 | % |  | 1.05 | % |  | 0.74 | %
Volatility factor of the expected market price of the common shares | 0.36 |  |  | 0.41 |  |  | 0.23 |
Expected life for the options (in years) | 1.00 |  |  | 1.00 |  |  | 1.00 |

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- Definition Tabular disclosure of the total intrinsic value of options exercised (or share units converted), share-based liabilities paid, and the total fair value of shares vested during the year. + 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 (d)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + 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://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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