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Earnings Per Share (Tables) | 9 Months Ended
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Sep. 30, 2015
Earnings Per Share [Abstract] |
Basic and diluted earnings per common share | Basic and diluted earnings per common share were calculated as follows (in thousands, except per share amounts):
|  | Three Months Ended September 30, |  | Nine Months Ended September 30,
|  | 2015 |  | 2014 |  | 2015 |  | 2014
Basic weighted average number of shares outstanding |  | 39,663 |  |  | 39,123 |  |  | 39,568 |  |  | 38,977 |
Effect of dilutive securities: |  |  |  |  |  |  |  |
Convertible debt (1) |  | 2,176 |  |  | 2,176 |  |  | 2,176 |  |  | 2,176 |
Stock options and unvested restricted stock |  | 353 |  |  | 357 |  |  | 390 |  |  | 411 |
Diluted average shares outstanding |  | 42,192 |  |  | 41,656 |  |  | 42,134 |  |  | 41,564 |
Net earnings as reported |  | $ | 30,308 |  |  | $ | 32,577 |  |  | $ | 75,841 |  |  | $ | 93,033 |
Interest attributable to convertible senior notes, net of income taxes |  | 385 |  |  | 378 |  |  | 1,189 |  |  | 1,135 |
Net earnings for diluted earnings per share |  | $ | 30,693 |  |  | $ | 32,955 |  |  | $ | 77,030 |  |  | $ | 94,168 |
Basic earnings per share |  | $ | 0.76 |  |  | $ | 0.83 |  |  | $ | 1.92 |  |  | $ | 2.39 |
Diluted earnings per share (1) |  | $ | 0.73 |  |  | $ | 0.79 |  |  | $ | 1.83 |  |  | $ | 2.27 |
Antidilutive stock options not included in the calculation of diluted earnings per share |  | 3 |  |  | 22 |  |  | — |  |  | 24 |
(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.

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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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