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Earnings Per Share (Tables) | 6 Months Ended
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Jun. 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 June 30, |  | Six Months Ended June 30,
|  | 2015 |  | 2014 |  | 2015 |  | 2014
Basic weighted average number of shares outstanding |  | 39,648 |  |  | 39,118 |  |  | 39,520 |  |  | 38,904 |
Effect of dilutive securities: |  |  |  |  |  |  |  |
Convertible debt (1) |  | 2,176 |  |  | 2,176 |  |  | 2,176 |  |  | 2,176 |
Stock options and unvested restricted stock |  | 321 |  |  | 304 |  |  | 383 |  |  | 407 |
Diluted average shares outstanding |  | 42,145 |  |  | 41,598 |  |  | 42,079 |  |  | 41,487 |
Net earnings as reported |  | $ | 29,133 |  |  | $ | 35,079 |  |  | $ | 45,533 |  |  | $ | 60,456 |
Interest attributable to convertible senior notes, net of income taxes |  | 386 |  |  | 378 |  |  | 771 |  |  | 757 |
Net earnings for diluted earnings per share |  | $ | 29,519 |  |  | $ | 35,457 |  |  | $ | 46,304 |  |  | $ | 61,213 |
Basic earnings per share |  | $ | 0.73 |  |  | $ | 0.90 |  |  | $ | 1.15 |  |  | $ | 1.55 |
Diluted earnings per share (1) |  | $ | 0.70 |  |  | $ | 0.85 |  |  | $ | 1.10 |  |  | $ | 1.48 |
Antidilutive stock options not included in the calculation of diluted earnings per share |  | 14 |  |  | 254 |  |  | 7 |  |  | 20 |
(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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