v2.4.0.6

Ceded Reinsurance (Effect Of Reinsurance And Retrocessional Activity On Premiums Written And Earned And On Net Claims And Claim Expenses) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Premiums written
Direct	$ 11,736	$ 9,309	$ 20,199	$ 15,561
Assumed	655,600	632,254	1,311,288	1,236,507
Ceded	(239,706)	(213,568)	(411,282)	(371,498)
Net premiums written	427,630	427,995	920,205	880,570
Premiums earned
Direct	7,950	4,033	15,737	6,515
Assumed	341,620	306,757	698,906	701,292
Ceded	(105,154)	(93,615)	(191,562)	(185,091)
Net premiums earned	244,416	217,175	523,081	522,716
Claims and claim expenses
Gross claims and claim expenses incurred	70,101	164,670	85,383	1,027,993
Claims and claim expenses recovered	(20,550)	(13,409)	(20,280)	(248,195)
Net claims and claim expenses incurred	$ 49,551	$ 151,261	$ 65,103	$ 779,798

X

- Definition

Premiums assumed and earned for all insurance assumed from other insurers as a result of reinsurance arrangements.

+ References

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- Definition

Premiums assumed and earned by another insurer as a result of reinsurance arrangements.

+ References

No definition available.

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- Definition

Premiums earned directly for all insurance before adding contracts assumed from other insurers or subtracting any amounts assumed by other insurers.

+ References

No definition available.

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- Definition

Premiums for all insurance assumed from other insurers, that is premiums ceded to the entity by other insurers.

+ References

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 113

-Paragraph 27

-Subparagraph a, b

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.



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-Section 50

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- Definition

Total consideration paid and payable to reinsurers during the period pursuant to terms of reinsurance arrangements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 17

-Article 12



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-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.



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- Definition

Total consideration paid and payable by direct policyholders for insurance contracts sold by the Entity during the period. This amount does not include premium assumed from or ceded to other insurers.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 17

-Article 12



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-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.



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- Definition

Total provision in the period for future policy benefits, claims incurred and costs incurred in the claims settlement process before the effects of reinsurance arrangements.

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-Publisher SEC

-Name Regulation S-X (SX)

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- Definition

Provision for benefits, claims and claims settlement expenses incurred during the period net of the effects of contracts assumed and ceded.

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-Publisher SEC

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- Definition

Premiums earned on the income statement for all insurance and reinsurance contracts after subtracting any amounts ceded to another insurer and adding premiums assumed from other insurers.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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-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.



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- Definition

Premiums written for all insurance and reinsurance contracts, after adding premiums assumed from other insurers and subtracting any amounts ceded to another insurer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 17

-Article 12



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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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-Paragraph 27

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-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.



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- Definition

The net amount in the period for future policy benefits and costs incurred under policies assumed and estimated recoupments under policies ceded.

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-Publisher AICPA

-Name Statement of Position (SOP)

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-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.



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