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Earnings per Share (Tables) | 9 Months Ended
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Sep. 30, 2013
Earnings Per Share [Abstract] |
Schedule of calculation of basic and diluted earnings per share | The following table sets forth the calculations of basic and diluted earnings per share:
| For the Three Months Ended September 30, |  | For the Nine Months Ended September 30,
| 2013 |  | 2012 |  | 2013 |  | 2012
| (in thousands, except per share amounts)
Net income (loss) | $ | 70,690 |  |  | $ | (38,336 | ) |  | $ | 163,939 |  |  | $ | 12,889 |
Basic weighted-average common shares outstanding | 66,943 |  |  | 65,745 |  |  | 66,486 |  |  | 64,815 |
Add: dilutive effect of stock options, unvested RSUs, and contingent PSUs | 1,310 |  |  | — |  |  | 1,483 |  |  | 1,870 |
Add: dilutive effect of 3.50% Senior Convertible Notes | — |  |  | — |  |  | — |  |  | 658 |
Diluted weighted-average common shares outstanding | 68,253 |  |  | 65,745 |  |  | 67,969 |  |  | 67,343 |
Basic net income (loss) per common share | $ | 1.06 |  |  | $ | (0.58 | ) |  | $ | 2.47 |  |  | $ | 0.20 |
Diluted net income (loss) per common share | $ | 1.04 |  |  | $ | (0.58 | ) |  | $ | 2.41 |  |  | $ | 0.19 |

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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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