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Fair Value Measurements (Tables) | 3 Months Ended
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Mar. 31, 2013
Fair Value Disclosures [Abstract] |
Changes in Level 3 liabilities | Changes in Level 3 liabilities are as follows (in thousands):
| Three months ended March 31, 2013 |  | Year Ended December 31, 2012
Balance, beginning of period | $ | — |  |  | $ | 16,622 |
Fair value adjustments, net | — |  |  | (2,649 | )
Reclassification to additional paid-in capital | — |  |  | (13,973 | )
Net transfers in/(out) | — |  |  | — |
Balance, end of period | $ | — |  |  | $ | — |
Carrying value and estimated fair value of convertible notes and long-term debt | The carrying value and estimated fair value of the Company’s convertible notes and long-term debt are as follows (in thousands):
| March 31, 2013 |  | December 31, 2012
| Carrying Value |  | Fair Value |  | Carrying Value |  | Fair Value
2008 Notes (1) | $ | — |  |  | $ | — |  |  | $ | 5,133 |  |  | $ | 5,163 |
2012 Term Loan | 24,405 |  |  | 24,405 |  |  | 25,000 |  |  | 25,000 |
Capital lease obligations | 1,944 |  |  | 1,863 |  |  | 1,784 |  |  | 1,736 |
(1)The carrying value of the 2008 Notes represents the discounted debt component only, while the fair value of the Notes is based on the market value of the respective notes, including convertible equity features.

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- Definition Schedule of carrying value and estimated fair value of convertible notes and long term debt. + References No definition available. + Details
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- Definition Tabular disclosure of the fair value measurement of liabilities using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets), and gains or losses recognized in other comprehensive income (loss) and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs) by class of liability. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19279-110258 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 32 -Subparagraph c -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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