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Financing Arrangements (Tables) | 12 Months Ended
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Dec. 31, 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 are as follows (dollars in thousands):
| December 31, 2015 Restated |  | December 31, 2014 |
Convertible notes payable, 2.16% to 3.84%, due 2015, VIE | $ | — |  |  | $ | 334 |
2019 Convertible Senior Notes |  |  |
Principal amount outstanding | 245,000 |  |  |
Unamortized discount | (43,015 | ) |  |
Net carrying amount | 201,985 |  |  |
Total current portion of notes payable | $ | 201,985 |  |  | $ | 334 |
2019 Convertible Senior Notes |  |  |
Principal amount outstanding | $ | — |  |  | $ | 245,000 |
Unamortized discount | — |  |  | (49,092 | )
Net carrying amount | — |  |  | 195,908 |
Total long-term portion of notes payable | $ | — |  |  | $ | 195,908 |

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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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