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Reinsurance - Additional Information (Detail) (USD $) | 6 Months Ended |  |  | 0 Months Ended | 6 Months Ended
--- | --- | --- | --- | --- | ---
Mar. 31, 2013 | Oct. 17, 2011 | Apr. 08, 2011 | Jan. 01, 2013 Fgl Reinsurance Agreement With Fsr [Member] | Mar. 31, 2013 Nomura [Member]
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items] |  |  |  |  |
Fair value of insurance transferred assets |  | $ 580,700,000 | $ 535,800,000 |  |
Pre-tax gain on reinsurance transactions deferred | 18,000,000 |  |  |  |
Reserve financing facility |  |  |  |  | 295,000,000
Upfront structuring fee |  |  |  |  | 2,800,000
LetterofCreditFutureQuarterlyReductiun |  |  |  |  | 6,300,000
Reinsurance arrangment in percentage |  |  |  | 10.00% |
Payments for reinsurance |  |  |  | $ 1,500,000,000 |

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- Definition Cash payments made for reinsurance during the current period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3536-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 27 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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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