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Convertible Notes (Tables) | 9 Months Ended
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Sep. 30, 2012
Debt Disclosure [Abstract] |
Schedule of convertible notes |
(Dollars in thousands) |  | As of September 30, 2012 |  | As of December 31, 2011
5% Convertible Senior Notes due 2014 (the “2014 Notes”) |  | $ | 172,500 |  |  | $ | 172,500 |
Unamortized discount |  | (28,625 | ) |  | (39,007 | )
Total convertible notes |  | $ | 143,875 |  |  | $ | 133,493 |
Less current portion |  | — |  |  | — |
Total long-term convertible notes |  | $ | 143,875 |  |  | $ | 133,493 |
Schedule of interest expense on notes |
| Three Months Ended |  | Nine Months Ended
| September 30, |  | September 30,
| 2012 |  | 2011 |  | 2012 |  | 2011
| (In thousands)
2014 Notes coupon interest at a rate of 5% | $ | 2,156 |  |  | $ | 2,156 |  |  | $ | 6,469 |  |  | $ | 6,468 |
2014 Notes amortization of discount and debt issuance costs at an additional effective interest rate of 11.7% | 3,789 |  |  | 3,254 |  |  | 10,856 |  |  | 9,326 |
Total interest expense on convertible notes | $ | 5,945 |  |  | $ | 5,410 |  |  | $ | 17,325 |  |  | $ | 15,794 |

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- Definition Tabular disclosure of the amounts of interest expense related to convertible notes during the reporting period. + References No definition available. + Details
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- Definition Tabular disclosure of information pertaining to short-term and long-debt instruments or arrangements, including but not limited to identification of terms, features, collateral requirements and other information necessary to a fair presentation. + References No definition available. + Details
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