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Earnings (loss) per share (Tables) | 9 Months Ended
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Sep. 30, 2016
Earnings Per Share [Abstract] |
Basic and diluted earnings (loss) per share | The following table shows the basic and diluted earnings (loss) per share for the three and nine months ended September 30, 2016 and 2015:
| For the three months ended September 30,
| 2016 |  | 2015
| Loss | Shares (000) | Per-Share |  | Loss | Shares (000) | Per-Share
Net loss | $ | (58,273 | ) |  |  |  | $ | (56,112 | ) |  |
Amount allocated to common stockholders | 100.00 | % |  |  |  | 100.00 | % |  |
Basic and diluted EPS: |  |  |  |  |  |  |
Net loss allocated to common stockholders | $ | (58,273 | ) | 87,076 |  | $ | (0.67 | ) |  | $ | (56,112 | ) | 86,907 |  | $ | (0.65 | )
| For the nine months ended September 30,
| 2016 |  | 2015
| Loss | Shares (000) | Per-Share |  | Income | Shares (000) | Per-Share
Net loss | $ | (83,951 | ) |  |  |  | $ | (16,230 | ) |  |
Amount allocated to common stockholders | 100.00 | % |  |  |  | 100.00 | % |  |
Basic and diluted EPS: |  |  |  |  |  |  |
Net loss allocated to common stockholders | $ | (83,951 | ) | 87,059 |  | $ | (0.96 | ) |  | $ | (16,230 | ) | 87,524 |  | $ | (0.19 | )
Securities excluded from the calculation of diluted EPS |
Securities excluded from the calculation of diluted EPS: | Three months ended September 30, | Nine months ended September 30,
| 2016 | 2015 | 2016 | 2015
Stock options | 372,569 |  | 317,266 |  | 391,375 |  | 327,599 |
Service-based share awards | 1,449,520 |  | 646,128 |  | 1,157,077 |  | 599,001 |

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- Definition Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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