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Basis of Consolidation and Presentation (Tables) | 9 Months Ended
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Sep. 30, 2015
Organization Consolidation And Presentation Of Financial Statements [Abstract] |
Calculation of Basic and Diluted Net Income (Loss) per Share | The following table presents information necessary to calculate net income (loss) per share for the three and nine month periods ended September 30, 2015 and 2014 as well as potentially dilutive securities excluded from the weighted average number of diluted common shares outstanding because their inclusion would have been anti-dilutive (in thousands, except per share amounts):
| Three Months Ended |  |  | Nine Months Ended |
| September 30, |  |  | September 30, |
| 2015 |  |  | 2014 |  |  | 2015 |  |  | 2014 |
BASIC EPS: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) | $ | (225,978 | ) |  | $ | 15,976 |  |  | $ | (235,828 | ) |  | $ | 105,081 |
Adjust for (income) loss attributed to holders of non-vested restricted stock |  | 2,359 |  |  |  | (160 | ) |  |  | 2,436 |  |  |  | (1,074 | )
Income (loss) attributed to common stockholders | $ | (223,619 | ) |  | $ | 15,816 |  |  | $ | (233,392 | ) |  | $ | 104,007 |
Weighted average number of common shares outstanding, excluding non-vested shares of restricted stock |  | 145,662 |  |  |  | 144,798 |  |  |  | 145,317 |  |  |  | 143,778 |
Basic net income (loss) per common share | $ | (1.54 | ) |  | $ | 0.11 |  |  | $ | (1.61 | ) |  | $ | 0.72 |
DILUTED EPS: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income (loss) attributed to common stockholders | $ | (223,619 | ) |  | $ | 15,816 |  |  | $ | (233,392 | ) |  | $ | 104,007 |
Weighted average number of common shares outstanding, excluding non-vested shares of restricted stock |  | 145,662 |  |  |  | 144,798 |  |  |  | 145,317 |  |  |  | 143,778 |
Add dilutive effect of potential common shares |  | — |  |  |  | 2,193 |  |  |  | — |  |  |  | 2,323 |
Weighted average number of diluted common shares outstanding |  | 145,662 |  |  |  | 146,991 |  |  |  | 145,317 |  |  |  | 146,101 |
Diluted net income (loss) per common share | $ | (1.54 | ) |  | $ | 0.11 |  |  | $ | (1.61 | ) |  | $ | 0.71 |
Potentially dilutive securities excluded as anti-dilutive |  | 7,840 |  |  |  | 442 |  |  |  | 7,840 |  |  |  | 473 |

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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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