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Share-based compensation (Tables) | 12 Months Ended
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Dec. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Summary of options, fully vested and exercisable | A summary of activity under our Stock Incentive Plan during the year ended December 31, 2016 is presented below:
Options | Number | Weighted Average Exercise Price | Weighted Average Remaining Contractual Term (years) | Aggregate Intrinsic Value
Outstanding at January 1, 2016 | 443,737 |  | $ | 27.06 |  |  |
Exercised | — |  | — |  |  |
Forfeited/expired | (84,167 | ) | 36.06 |  |  |
Outstanding, fully vested and exercisable at December 31, 2016 (1) | 359,570 |  | $ | 24.95 |  | 1.61 | $ | 424 |
(1) | As the result of actions in 2011 that were determined to be a "change of control" under the Stock Incentive Plan, all options will remain exercisable for their respective remaining term, regardless of whether the awardees remain employees of Century.
Summary of service-based share awards activity |
Service-based share awards |
Outstanding at January 1, 2016 | 541,304 |
Granted | 528,189 |
Vested | (197,724 | )
Forfeited | (130,733 | )
Outstanding at December 31, 2016 | 741,036 |
| Year ended December 31,
| 2016 | 2015 | 2014
Weighted average per share fair value of service-based share grants | $ | 7.14 |  | $ | 4.21 |  | $ | 15.31 |
Total intrinsic value of option exercises | — |  | — |  | 1,011 |
Share-based compensation expense | The following table summarizes the compensation cost recognized for the years ended December 31, 2016, 2015 and 2014 for all options, service-based and performance-based share awards. The compensation cost is included as part of selling, general and administrative expenses in our Consolidated Statements of Operations.
| Year ended December 31,
| 2016 | 2015 | 2014
Share-based compensation expense reported: |  |  |
Performance-based share expense | $ | 1,441 |  | $ | 1,587 |  | $ | 1,090 |
Service-based share expense | 1,263 |  | 257 |  | 244 |
Total share-based compensation expense before income tax | 2,704 |  | 1,844 |  | 1,334 |
Income tax | — |  | — |  | — |
Total share-based compensation expense, net of income tax | $ | 2,704 |  | $ | 1,844 |  | $ | 1,334 |

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- Definition Tabular disclosure of the amount of total share-based compensation cost, including the amounts attributable to each share-based compensation plan and any related tax benefits. + 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 (h)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of share-based compensation plans that may be presented in a single table for outstanding, vested and expected to vest, and exercisable awards. The information that may be disclosed in this table may include, but is not limited to, number of shares, weighted average exercise price, weighted average remaining contractual life, and aggregate intrinsic value. + References No definition available. + Details
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- Definition Tabular disclosure of the following for fully vested share options (or share units) and share options expected to vest at the date of the latest statement of financial position: the number, weighted-average exercise price (or conversion ratio), aggregate intrinsic value (except for nonpublic entities), and weighted-average remaining contractual term of options (or share units) currently exercisable (or convertible). + 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 (e)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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