v2.3.0.15

Investments (Components Of Net Investment Income) (Details) (USD $) In Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Investment income before investment expenses	$ (25,414)	$ 62,398	$ 73,567	$ 159,296
Investment expenses	(2,526)	(2,828)	(7,898)	(7,844)
Net investment (loss) income	(27,940)	59,570	65,669	151,452
Fixed Maturity Investments [Member]
Components Of Net Investment Income	11,435	35,219	63,774	92,108
Short-Term Investments [Member]
Components Of Net Investment Income	281	635	1,309	1,803
Equity Securities [Member]
Components Of Net Investment Income	171		297
Other Investments, Other [Member]
Components Of Net Investment Income	(11,665)	18,979	2,000	32,013
Cash And Cash Equivalents [Member]
Components Of Net Investment Income	66	74	152	157
Other Investments Hedge Funds And Private Equity Investments [Member]
Components Of Net Investment Income	$ (25,702)	$ 7,491	$ 6,035	$ 33,215

X

- Definition

This item represents the total of all interest and dividend income on fixed maturity investments, short term investments, equity investments trading and other investments (including any amortization/accretion of discounts/premiums), interest income earned on cash and cash equivalents and net gain or loss, both realized and unrealized, on other investments.

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X

- Definition

Investment income before investment expenses

+ Details

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X

- Definition

Total expenses related to the generation of investment income in debt and equity securities.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.9)

-URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688

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X

- Definition

The income earned from investments in securities and property, equipment and other capital assets. It includes rent from property and equipment, dividends from shares in corporations, and interest from bonds, loans, mortgages, derivatives, commercial paper, bank accounts, certificates of deposits, treasuries, and other financial securities. It does not include realized gains and losses on investments.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 16

-Article 12



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Paragraph 2

-Article 7



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 225

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-04.2)

-URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913

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