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Earnings per Share (Tables) | 3 Months Ended
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Mar. 31, 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 March 31,
| 2013 |  | 2012
| (in thousands, except per share amounts)
Net income | $ | 16,727 |  |  | $ | 26,336 |
Basic weighted-average common shares outstanding | 66,211 |  |  | 64,104 |
Add: dilutive effect of stock options, unvested RSUs, and contingent PSUs | 1,310 |  |  | 2,210 |
Add: dilutive effect of 3.50% Senior Convertible Notes | — |  |  | 1,531 |
Diluted weighted-average common shares outstanding | 67,521 |  |  | 67,845 |
Basic net income per common share | $ | 0.25 |  |  | $ | 0.41 |
Diluted net income per common share | $ | 0.25 |  |  | $ | 0.39 |

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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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