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Earnings per share (Tables) | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2014 | Dec. 31, 2013
Earnings Per Share [Abstract] |  |
Schedule of reconciliation of basic and diluted weighted average shares outstanding | The following sets forth the computation of basic and diluted earnings (loss) per share for the three and nine months ended September 30, 2014 and 2013:
|  |  | For the three months ended |  | For the nine months ended
|  |  | September 30, 2014 |  | September 30, 2013 |  | September 30, 2014 |  | September 30, 2013
Weighted-average number of common shares outstanding: |  |  |  |  |  |  |  |
| Basic number of common shares outstanding |  | 103,295,920 |  |  | 89,620,394 |  |  | 103,275,204 |  |  | 82,630,430 |
| Dilutive effect of options |  | — |  |  | 294,434 |  |  | 1,494,711 |  |  | — |
| Dilutive effect of warrants |  | — |  |  | 1,000,977 |  |  | 1,684,860 |  |  | 823,405 |
| Diluted number of common shares outstanding |  | 103,295,920 |  |  | 90,915,805 |  |  | 106,454,775 |  |  | 83,453,835 |
Basic net income (loss) per common share: |  |  |  |  |  |  |  |
| Net income (loss) |  | $ | (5,997 | ) |  | $ | 46,570 |  |  | $ | 65,074 |  |  | $ | 147,223 |
| Net income allocated to participating shares |  | — |  |  | (322 | ) |  | (420 | ) |  | (1,099 | )
| Net income (loss) available to common shareholders |  | $ | (5,997 | ) |  | $ | 46,248 |  |  | $ | 64,654 |  |  | $ | 146,124 |
| Basic net income (loss) per common share |  | $ | (0.06 | ) |  | $ | 0.52 |  |  | $ | 0.63 |  |  | $ | 1.77 |
Diluted net income (loss) per common share: |  |  |  |  |  |  |  |
| Net income (Loss) |  | $ | (5,997 | ) |  | $ | 46,570 |  |  | $ | 65,074 |  |  | $ | 147,223 |
| Net income allocated to participating securities |  | — |  |  | (318 | ) |  | (408 | ) |  | (1,089 | )
| Net income (loss) available to common shareholders |  | $ | (5,997 | ) |  | $ | 46,252 |  |  | $ | 64,666 |  |  | $ | 146,134 |
| Diluted net income (loss) per common share |  | $ | (0.06 | ) |  | $ | 0.51 |  |  | $ | 0.61 |  |  | $ | 1.75 |
| The following sets forth the computation of basic and diluted earnings per share for the years ended December 31, 2013 and 2012 and period from October 6, 2011 (date of incorporation) to December 31, 2011:
|  |  | 2013 |  | 2012 |  | 2011
Weighted-average number of common shares outstanding: |  | ($ in thousands)
| Basic number of common shares outstanding |  | 87,505,540 |  |  | 78,432,132 |  |  | 78,432,132 |
| Dilutive effect of options |  | 400,149 |  |  | — |  |  | — |
| Dilutive effect of warrants |  | 1,064,842 |  |  | 166,104 |  |  | — |
| Diluted number of common shares outstanding |  | 88,970,531 |  |  | 78,598,236 |  |  | 78,432,132 |
Basic net income (loss) per common share: |  |  |  |  |  |
| Net income (loss) |  | $ | 227,311 |  |  | $ | 99,401 |  |  | $ | (1,130 | )
| Income allocated to participating shares |  | (1,618 | ) |  | (734 | ) |  | — |
| Net income (loss) available to common shareholders |  | $ | 225,693 |  |  | $ | 98,667 |  |  | $ | (1,130 | )
| Basic net income (loss) per common share |  | $ | 2.58 |  |  | $ | 1.26 |  |  | $ | (0.01 | )
Diluted net income (loss) per common share |  |  |  |  |  |
| Net income (loss) |  | $ | 227,311 |  |  | $ | 99,401 |  |  | $ | (1,130 | )
| Income allocated to participating securities |  | (1,592 | ) |  | (737 | ) |  | — |
| Net income (loss) available to common shareholders |  | $ | 225,719 |  |  | $ | 98,664 |  |  | $ | (1,130 | )
| Diluted net income (loss) per common share |  | $ | 2.54 |  |  | $ | 1.26 |  |  | $ | (0.01 | )

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- Definition Tabular disclosure of the weighted average number of shares used in calculating basic net earnings per share (or unit) and diluted earnings per share (or unit). + 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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