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Financing Arrangements (Tables) | 6 Months Ended
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Jun. 30, 2015
Debt Disclosure [Abstract] |
Summary of carrying values and coupon rates on financing arrangements | The carrying values and the fixed contractual coupon rates of the Company's financing arrangements as of June 30, 2015 and December 31, 2014 were as follows (in thousands):
| June 30, 2015 |  | December 31, 2014
2019 Convertible Senior Notes |  |  |
Principal amount outstanding | $ | 245,000 |  |  | $ | 245,000 |
Unamortized discount | (44,433 | ) |  | (49,092 | )
Net carrying amount | 200,567 |  |  | 195,908 |
Convertible notes payable, Viking Therapeutics, Inc. | — |  |  | 334 |
Total notes payable | $ | 200,567 |  |  | $ | 196,242 |

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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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