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Significant Accounting Policies (Details 1) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Unsecured amounts due from reinsurers whose aggregate balance exceeds 3% of the stockholders equity
Reinsurance unsecured amounts due from reinsurers total	$ 239,663	$ 295,419
Everest Reinsurance Company [Member]
Unsecured amounts due from reinsurers whose aggregate balance exceeds 3% of the stockholders equity
Reinsurance unsecured amounts due from reinsurers total	45,236	264,997
Florida Hurricane Catastrophe Fund [Member]
Unsecured amounts due from reinsurers whose aggregate balance exceeds 3% of the stockholders equity
Reinsurance unsecured amounts due from reinsurers total		30,422
Odyssey Reinsurance Company [Member]
Unsecured amounts due from reinsurers whose aggregate balance exceeds 3% of the stockholders equity
Reinsurance unsecured amounts due from reinsurers total	$ 194,427

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Reinsurance unsecured amounts due from reinsurers.

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