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Income Taxes - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified | 6 Months Ended |
--- | --- | ---
Jun. 30, 2013 | Dec. 31, 2010
Operating Loss Carryforwards [Line Items] |  |
Loss carry-forwards exceed |  | $ 3,400,000
Percentage of payment to IRS, Tier C | 12.50% |
Percentage of payment to IRS, Tier D | 17.50% |
Expiration period | Expiring in 2029 and will fully expire in 2034 |
Operating tax carryforward expiration year start | 2029 |
Operating tax carryforward expiration year end | 2034 |
Relinquishment of carry-forward of loss | 1,059,988 |
Net operating loss was reduced for cancellation of indebtedness income and reduction of interest expense | 816,380 |
U. S. Federal Net Operating Tax [Member] |  |
Operating Loss Carryforwards [Line Items] |  |
Net operating tax carryforward | 5,151,410 |
Ambac Assurance [Member] |  |
Operating Loss Carryforwards [Line Items] |  |
Potential payment to outstanding disputes | 100,000 |
Ambac [Member] |  |
Operating Loss Carryforwards [Line Items] |  |
Potential payment to outstanding disputes | $ 1,900 |

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- Definition Payment by subsidiary to the Internal Revenue Service associated with Net Operating Loss Usage Tier C under the Amended Tax Sharing Agreement. + References No definition available. + Details
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- Definition Payment by subsidiary to the Internal Revenue Service associated with Net Operating Loss Usage Tier D under the Amended Tax Sharing Agreement. + References No definition available. + Details
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- Definition The expiration date of each operating loss carryforward included in total operating loss carryforwards, or the applicable range of such expiration dates. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32559-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 48 -Subparagraph a -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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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