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Principal Amount Outstanding under Loan Arrangement (Detail) (USD $) In Thousands, unless otherwise specified |  |  |  | 12 Months Ended
--- | --- | --- | --- | ---
Dec. 31, 2012 | Oct. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2012 June 27, 2012 | Dec. 31, 2012 October 18, 2012
Related Party Transaction [Line Items] |  |  |  |  |
Principal amount outstanding at December 31, 2011 | $ 119,635 |  | $ 277,203 |  |
Borrowings | 12,750 | 125,400 | 45,000 |  |
Capitalization of accrued and unpaid interest due and payable | 2,200 |  | 5,900 | 11,876 | 2,343
Reduction of principal indebtedness related to the issuance of common stock pursuant to common stock purchase agreement completed |  |  |  | (77,187) | (107,350)
Principal amount outstanding at December 31, 2012 | $ 119,635 |  | $ 277,203 |  |

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- Definition Related party transaction principal amount outstanding under loan arrangement. + References No definition available. + Details
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- Details
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