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Earnings (Loss) Per Common Share (Tables) | 9 Months Ended
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Sep. 30, 2013
Schedule of Earnings Per Share Basic and Diluted |
|  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
|  | 2013 |  |  | 2012 |  |  | 2013 |  |  | 2012 |
Numerator—basic and diluted |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) |  | $ | (50,621 | ) |  | $ | 22,713 |  |  | $ | (3,455 | ) |  | $ | 48,891 |
Denominator |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average number of common shares outstanding—basic |  |  | 39,094 |  |  |  | 40,387 |  |  |  | 39,212 |  |  |  | 40,446 |
Effect of dilutive stock options |  |  | — |  |  |  | 160 |  |  |  | — |  |  |  | 590 |
Effect of dilutive convertible notes |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 224 |
Effect of dilutive restricted shares |  |  | — |  |  |  | 555 |  |  |  | — |  |  |  | 622 |
Weighted average number of common shares outstanding—diluted |  |  | 39,094 |  |  |  | 41,102 |  |  |  | 39,212 |  |  |  | 41,882 |
Earnings (loss) per common share—basic |  | $ | (1.29 | ) |  | $ | 0.56 |  |  | $ | (0.09 | ) |  | $ | 1.21 |
Earnings (loss) per common share—diluted |  | $ | (1.29 | ) |  | $ | 0.55 |  |  | $ | (0.09 | ) |  | $ | 1.17 |
Antidilutive stock options and restricted shares |  |  | 4,586 |  |  |  | 5,421 |  |  |  | 4,677 |  |  |  | 3,678 |

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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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