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Convertible Notes, Long-Term Debt and Credit Facility - Additional Disclosures (Details) (USD $) | 0 Months Ended | 24 Months Ended |
--- | --- | --- | ---
Jan. 22, 2013 | Dec. 31, 2012 | Feb. 11, 2008
Debt Disclosure [Abstract] |  |  |
Share lending agreement, number of common stock shares loaned |  |  | 3,800,000
Own share lending arrangement nominal loan fee per share |  |  | $ 0.0001
Return of borrowed shares, in shares | 2,439,558 | 1,360,442 |

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- Definition Own share lending arrangement nominal loan fee per share. + References No definition available. + Details
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- Definition Own share lending arrangement shares returned. + References No definition available. + Details
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Period Type: | duration

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- Details
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- Definition The number of shares issued in connection with an own-share lending arrangement entered into by the entity, in contemplation of a convertible debt offering or other financing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 2A -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=7656903&loc=SL6757479-112611 + Details
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