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Basis of Consolidation and Presentation (Tables) | 6 Months Ended
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Jun. 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 six month periods ended June 30, 2015 and 201 4 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 |  |  | Six Months Ended |
| June 30, |  |  | June 30, |
| 2015 |  |  | 2014 |  |  | 2015 |  |  | 2014 |
BASIC EPS: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) | $ | (18,975 | ) |  | $ | 54,283 |  |  | $ | (9,850 | ) |  | $ | 89,105 |
Adjust for (income) loss attributed to holders of non-vested restricted stock |  | 198 |  |  |  | (559 | ) |  |  | 109 |  |  |  | (910 | )
Income (loss) attributed to common stockholders | $ | (18,777 | ) |  | $ | 53,724 |  |  | $ | (9,741 | ) |  | $ | 88,195 |
Weighted average number of common shares outstanding, excluding non-vested shares of restricted stock |  | 145,300 |  |  |  | 143,622 |  |  |  | 145,142 |  |  |  | 143,259 |
Basic net income (loss) per common share | $ | (0.13 | ) |  | $ | 0.37 |  |  | $ | (0.07 | ) |  | $ | 0.62 |
DILUTED EPS: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income (loss) attributed to common stockholders | $ | (18,777 | ) |  | $ | 53,724 |  |  | $ | (9,741 | ) |  | $ | 88,195 |
Weighted average number of common shares outstanding, excluding non-vested shares of restricted stock |  | 145,300 |  |  |  | 143,622 |  |  |  | 145,142 |  |  |  | 143,259 |
Add dilutive effect of potential common shares |  | 684 |  |  |  | 2,407 |  |  |  | 570 |  |  |  | 2,327 |
Weighted average number of diluted common shares outstanding |  | 145,984 |  |  |  | 146,029 |  |  |  | 145,712 |  |  |  | 145,586 |
Diluted net income (loss) per common share | $ | (0.13 | ) |  | $ | 0.37 |  |  | $ | (0.07 | ) |  | $ | 0.61 |
Potentially dilutive securities excluded as anti-dilutive |  | 5,028 |  |  |  | 432 |  |  |  | 5,728 |  |  |  | 432 |

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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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