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Financial Guarantees in Force - Additional Information (Detail) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2015 | Dec. 31, 2014
Guarantor Obligations [Line Items] |  |
Gross par amount of financial guarantees outstanding | $ 119,235,000 | $ 159,688,000
Net par amount of financial guarantees | 108,299,000 | 144,734,000
Gross financial guarantees in force | 188,853,000 | 253,383,000
Net financial guarantees in force | $ 171,000,000 | $ 228,890,000
Highest single insured risk of aggregate net par amount guaranteed | 1.60% |
California [Member] |  |
Guarantor Obligations [Line Items] |  |
Aggregate net par amounts in force | 14.30% |
New York [Member] |  |
Guarantor Obligations [Line Items] |  |
Aggregate net par amounts in force | 5.30% |
No other state [Member] | Maximum [Member] |  |
Guarantor Obligations [Line Items] |  |
Aggregate net par amounts in force | 5.00% |

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- Definition Financial guarantee insurance gross outstanding principal and interest. + References No definition available. + Details
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- Definition Financial guarantee insurance outstanding principal and interest, net of reinsurance. + References No definition available. + Details
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- Definition Percentage of related member outstanding par, net of reinsurance, as compared to the Company's total outstanding financial guarantee par, net of reinsurance. + References No definition available. + Details
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- Definition Percentage of highest single insured risk of aggregate net par amount guaranteed + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition The amount as of the balance sheet date of the participating business in force. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 50 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6483535&loc=d3e16392-158451 + Details
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