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Financial Guarantee Insurance Contracts - Estimated Future Amortization Expense for Insurance Intangible Asset (Detail) (Insurance Intangible Asset [Member], USD $)
Jun. 30, 2013
Insurance Intangible Asset [Member]
 
Amortization Of Intangible Assets [Line Items]  
2013 $ 36,308
2014 130,324
2015 116,926
2016 107,120
2017 99,300
Thereafter $ 1,130,974