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Reinsurance (Details Textual) (USD $) In Billions, unless otherwise specified | 9 Months Ended
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Sep. 30, 2012 | Sep. 30, 2011
Reinsurance and Insurance Operations (Textual) [Abstract] |  |
In-force policyholder coverage for windstorm exposures | $ 127.6 |
Percentage of premium ceded | 45.00% | 50.00%
Increase in profitability over the contract term | 5.00% |

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- Definition In force policyholder coverage for windstorm exposures. + References No definition available. + Details
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- Definition Percentage of premium ceded. + References No definition available. + Details
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- Details
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