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Earnings Per Share (Tables) | 9 Months Ended
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Sep. 30, 2012
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted | The following table presents the weighted-average number of common shares outstanding used in the calculation of basic and diluted income (loss) per share:
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2012 |  | 2011 |  | 2012 |  | 2011
Weighted-average common shares outstanding - basic | 48,332,878 |  |  | 41,292,819 |  |  | 46,886,820 |  |  | 39,178,952 |
Dilutive effect of Equity-based Incentive Awards | — |  |  | 1,565,061 |  |  | 908,999 |  |  | 1,554,861 |
Weighted-average common shares outstanding - diluted | 48,332,878 |  |  | 42,857,880 |  |  | 47,795,819 |  |  | 40,733,813 |
Anti-dilutive Equity-based Incentive Awards excluded from the computation of diluted income per share | 658,445 |  |  | 30,000 |  |  | 575,059 |  |  | 46,560 |

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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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