Debt Instruments - Schedule of long-term debt (Details) - USD ($) $ in Thousands |
Mar. 31, 2016 |
Dec. 31, 2015 |
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| Debt Instrument [Line Items] | ||
| Long-term debt, net | $ 239,011 | $ 234,577 |
| Convertible debt | 1.75% convertible senior notes due 2020 | ||
| Debt Instrument [Line Items] | ||
| Long-term debt, gross | 345,000 | 345,000 |
| Unamortized discount on convertible senior notes | (105,989) | (110,423) |
| Long-term debt, net | $ 239,011 | $ 234,577 |
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- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition Amount, after accumulated amortization, of debt discount. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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