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Earnings/(Loss) Per Share (Tables) | 6 Months Ended
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Jun. 30, 2013
Earnings Per Share [Abstract] |
Basic and diluted (loss)/earnings per common share |
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2013 |  | 2012 |  | 2013 |  | 2012
Basic weighted average number of shares outstanding | 36,151 |  |  | 32,755 |  |  | 35,976 |  |  | 32,694 |
Effect of dilutive securities: |  |  |  |  |  |  |
Convertible debt (1) | 2,176 |  |  | — |  |  | 2,176 |  |  | — |
Stock options and unvested restricted stock | 431 |  |  | 349 |  |  | 510 |  |  | 392 |
Diluted weighted average shares outstanding | 38,758 |  |  | 33,104 |  |  | 38,662 |  |  | 33,086 |
Net earnings as reported | $ | 28,143 |  |  | $ | 8,005 |  |  | $ | 40,184 |  |  | $ | 3,251 |
Interest attributable to convertible senior notes, net of income taxes | 393 |  |  | — |  |  | 782 |  |  | — |
Net earnings for earnings per share | $ | 28,536 |  |  | $ | 8,005 |  |  | $ | 40,966 |  |  | $ | 3,251 |
Basic earnings per share | $ | 0.78 |  |  | $ | 0.24 |  |  | $ | 1.12 |  |  | $ | 0.10 |
Diluted earnings per share (1) | $ | 0.74 |  |  | $ | 0.24 |  |  | $ | 1.06 |  |  | $ | 0.10 |
Antidilutive stock options not included in the calculation of diluted income per share | 5 |  |  | 260 |  |  | 3 |  |  | 255 |
(1) | In the third quarter of 2012, we issued $126.5 million of 1.875% convertible senior notes convertible into shares of our common stock at a rate of 17.1985 shares per $1,000 principle amount. In accordance with ASC Subtopic 260-10, Earnings Per Share, ("ASC 260-10") we calculate the dilutive effect of convertible securities using the "if-converted" method.

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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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