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Earnings Per Share (Tables) | 3 Months Ended
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Mar. 31, 2014
Earnings Per Share [Abstract] |
Calculation of basic and diluted earnings per share | Basic and diluted earnings per share were calculated as follows, for each period presented:
| Quarter Ended
| March 31,
| 2014 |  | 2013
Numerator: |  |  |
Net income | $ | 15.8 |  |  | $ | 33.5 |
Denominator — Weighted-average common shares outstanding (in thousands): |  |  |
Basic 1 | 17,921 |  |  | 19,143 |
Add: dilutive effect of non-vested common shares, restricted stock units, performance shares and market-based shares | 122 |  |  | 131 |
Add: dilutive effect of warrants | 471 |  |  | 92 |
Diluted 2 | 18,514 |  |  | 19,366 |
Earnings per common share, Basic: |  |  |
Net income per share | $ | 0.88 |  |  | $ | 1.75 |
Earnings per common share, Diluted: |  |  |
Net income per share | $ | 0.85 |  |  | $ | 1.73 |
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1 | The basic weighted-average number of common shares outstanding during the period excludes non-vested common shares, restricted stock units, performance shares and market-based shares.
2 | The diluted weighted-average number of common shares outstanding during the periods were calculated using the treasury 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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