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Convertible Notes (Tables) | 9 Months Ended
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Sep. 30, 2011
Convertible Notes |
Schedule of convertible notes |
(in thousands) |  | As of September 30, 2011 |  | As of December 31, 2010 |
5% Convertible Senior Notes due 2014 (the “2014 Notes”) |  | $ | 172,500 |  | $ | 172,500 |
Unamortized discount |  | (42,146 | ) | (51,000 | )
Total convertible notes |  | $ | 130,354 |  | $ | 121,500 |
Less current portion |  | — |  | — |
Total long-term convertible notes |  | $ | 130,354 |  | $ | 121,500 |
Schedule of interest expense on notes |
|  | Three Months Ended September 30, |  | Nine Months Ended September 30, |
|  | 2011 |  | 2010 |  | 2011 |  | 2010 |
|  | (In thousands) |
2014 Notes coupon interest at a rate of 5% |  | $ | 2,156 |  | $ | 2,156 |  | $ | 6,468 |  | $ | 6,468 |
2014 Notes amortization of discount at an additional effective interest rate of 11.7% |  | 3,254 |  | 2,797 |  | 9,326 |  | 7,283 |
Zero Coupon Convertible Senior Notes due 2010 amortization of discount at an effective interest rate of 8.4% |  | — |  | — |  | — |  | 958 |
Total interest expense on convertible notes |  | $ | 5,410 |  | $ | 4,953 |  | $ | 15,794 |  | $ | 14,709 |

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