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Convertible Senior Notes(Tables) | 12 Months Ended
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Dec. 31, 2014
Debt Disclosure [Abstract] |
Schedule of Convertible Senior Notes | The following table summarizes the terms of the 2019 Notes.
| Principal Amount | Coupon Rate | Effective Rate (1) | Conversion Rate (2) | Maturity Date | Remaining Period of Amortization
March 2019 Notes | $ | 143,750 |  | 5.50 | % | 6.25 | % | 55.3649 |  | 3/15/2019 | 4.21 years
August 2019 Notes | $ | 111,000 |  | 5.50 | % | 6.50 | % | 55.3649 |  | 3/15/2019 | 4.21 years

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- Definition Tabular disclosure of borrowings which can be exchanged for a specified number of another security at the option of the issuer or the holder. Disclosures include, but are not limited to, principal amount, amortized premium or discount, and amount of liability and equity components. + References No definition available. + Details
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- Details
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