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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