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Convertible Notes | 3 Months Ended
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Mar. 31, 2013
Debt Disclosure [Abstract] |
Convertible Notes | Convertible Notes The Company’s convertible notes are shown in the following table:
(Dollars in thousands) |  | As of March 31, 2013 |  | As of December 31, 2012
5% Convertible Senior Notes due 2014 (the “2014 Notes”) |  | $ | 172,500 |  |  | $ | 172,500 |
Unamortized discount |  | (21,013 | ) |  | (24,944 | )
Total convertible notes |  | $ | 151,487 |  |  | $ | 147,556 |
Less current portion |  | — |  |  | — |
Total long-term convertible notes |  | $ | 151,487 |  |  | $ | 147,556 |
Interest expense related to the notes for the three months ended March 31, 2013 and 2012 was as follows:
| Three Months Ended
| March 31,
| 2013 |  | 2012
| (In thousands)
2014 Notes coupon interest at a rate of 5% | $ | 2,157 |  |  | $ | 2,157 |
2014 Notes amortization of discount and debt issuance costs at an additional effective interest rate of 11.7% | 4,089 |  |  | 3,510 |
Total interest expense on convertible notes | $ | 6,246 |  |  | $ | 5,667 |

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- Definition The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19,20,22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 20, 22 -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 129 -Paragraph 2, 4 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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