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Earnings Per Share (Tables) | 12 Months Ended
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Dec. 31, 2013
Earnings Per Share [Abstract] |
Components of basic and diluted earnings per common share | Basic and diluted earnings per common share are as follows (in thousands, except per share data):
| Year ended December 31,
| 2013 |  | 2012 |  | 2011
Net income attributable to common stockholders - Basic | $ | 36,178 |  |  | $ | 49,791 |  |  | $ | 26,540 |
Impact of assumed conversions: |  |  |  |  |
Interest on convertible notes | — |  |  | 1,959 |  |  | — |
Dividends on preferred stock | — |  |  | — |  |  | 141 |
Net income attributable to common stockholders - Diluted | $ | 36,178 |  |  | $ | 51,750 |  |  | $ | 26,681 |
Weighted average common shares outstanding - Basic | 51,346 |  |  | 48,185 |  |  | 44,229 |
Assumed conversions: |  |  |  |  |
Incremental common shares from warrants | 1,355 |  |  | 1,560 |  |  | 2,222 |
Incremental common shares from stock options | 1,133 |  |  | 992 |  |  | 747 |
Incremental common shares from restricted stock units | 7 |  |  | 116 |  |  | — |
Incremental common shares from convertible preferred stock before conversion | — |  |  | — |  |  | 440 |
Incremental common shares from convertible senior notes | — |  |  | 2,701 |  |  | — |
Weighted average common shares outstanding - Diluted | 53,841 |  |  | 53,554 |  |  | 47,638 |
Basic earnings per common share | $ | 0.70 |  |  | $ | 1.03 |  |  | $ | 0.60 |
Diluted earnings per common share | $ | 0.67 |  |  | $ | 0.97 |  |  | $ | 0.56 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations. + References No definition available. + Details
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