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Earnings (Loss) Per Share (Tables) | 12 Months Ended
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Dec. 31, 2013
Earnings Per Share [Abstract] |
Basic and diluted (loss)/earnings per common share |
|  | Years Ended December 31,
|  | 2013 |  | 2012 |  | 2011
Basic weighted average number of shares outstanding |  | 36,105 |  |  | 34,057 |  |  | 32,382 |
Effect of dilutive securities: |  |  |  |  |  |
Convertible debt (1) |  | 2,176 |  |  | 612 |  |  | N/A |
Stock options and unvested restricted stock (2) |  | 520 |  |  | 503 |  |  | — |
Diluted average shares outstanding |  | 38,801 |  |  | 35,172 |  |  | 32,382 |
Net earnings/(loss) as reported |  | $ | 124,464 |  |  | $ | 105,163 |  |  | $ | (21,106 | )
Interest attributable to Convertible Senior Notes, net of income taxes |  | 1,454 |  |  | 418 |  |  | — |
Net earnings/(loss) for earnings/(loss) per share |  | $ | 125,918 |  |  | $ | 105,581 |  |  | $ | (21,106 | )
Basic earnings/(loss) per share |  | $ | 3.45 |  |  | $ | 3.09 |  |  | $ | (0.65 | )
Diluted earnings/(loss) per share (1) (2) |  | $ | 3.25 |  |  | $ | 3.00 |  |  | $ | (0.65 | )
Antidilutive stock options not included in the calculation of diluted earnings per share |  | 7 |  |  | 256 |  |  | 1,731 |
(1) | In accordance with ASC 260-10, Earnings Per Share, ("ASC 260-10") we calculate the dilutive effect of convertible securities using the "if-converted" method. Reflects the converted shares and the interest savings (post-tax) of our $126.5 million of 1.875% Convertible Senior Notes.
(2) | For periods with a net loss, no options or non-vested shares are included in the dilution calculation as all options and non-vested shares outstanding are considered anti-dilutive.

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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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