v2.4.0.6

Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2012

Fair Value Disclosures [Abstract]

Schedule Of Assets And Liabilities Measured At Fair Value On A Recurring Basis

Below is a summary of the assets and liabilities that are measured at fair value on a recurring basis and also represents the carrying amount on the Company’s consolidated balance sheet:

	At March 31, 2012	Total				Quoted Prices in Active Markets for Identical  Assets (Level 1)				Significant Other Observable Inputs (Level 2)				Significant Unobservable Inputs (Level 3)
	Fixed maturity investments
	U.S. treasuries	$	1,309,243			$	1,309,243			$	—			$	—
	Agencies	343,575				—				343,575				—
	Non-U.S. government (Sovereign debt)	130,899				—				130,899				—
	FDIC guaranteed corporate	103,554				—				103,554				—
	Non-U.S. government-backed corporate	501,160				—				501,160				—
	Corporate	1,146,211				—				1,118,373				27,838
	Agency mortgage-backed	319,215				—				319,215				—
	Non-agency mortgage-backed	108,047				—				108,047				—
	Commercial mortgage-backed	329,343				—				329,343				—
	Asset-backed	10,872				—				10,872				—
	Total fixed maturity investments	4,302,119				1,309,243				2,965,038				27,838
	Short term investments	1,172,839				—				1,172,839				—
	Equity investments trading	53,080				53,080				—				—
	Other investments
	Private equity partnerships	389,451				—				—				389,451
	Senior secured bank loan funds	266,141				—				245,141				21,000
	Catastrophe bonds	95,827				—				95,827				—
	Non-U.S. fixed income funds	31,713				—				31,713				—
	Hedge funds	22,310				—				15,564				6,746
	Miscellaneous other investments	1,340				—				—				1,340
	Total other investments	806,782				—				388,245				418,537
	Other assets and (liabilities)
	Assumed and ceded (re)insurance contracts	6,163				—				—				6,163
	Derivatives (1)	33,405				413				6,427				26,565
	Other	13,936				(1,481		)		—				15,417
	Total other assets and (liabilities)	53,504				(1,068		)		6,427				48,145
		$	6,388,324			$	1,361,255			$	4,532,549			$	494,520

(1) See "Note 11. Derivative Instruments" for additional information related to the fair value by type of contract, of derivatives entered into by the Company.

	At December 31, 2011	Total				Quoted Prices in Active Markets for Identical  Assets (Level 1)				Significant Other Observable Inputs (Level 2)				Significant Unobservable Inputs (Level 3)
	Fixed maturity investments
	U.S. treasuries	$	885,152			$	885,152			$	—			$	—
	Agencies	158,561				—				158,561				—
	Non-U.S. government (Sovereign debt)	227,912				—				227,912				—
	FDIC guaranteed corporate	423,630				—				423,630				—
	Non-U.S. government-backed corporate	641,082				—				641,082				—
	Corporate	1,206,904				—				1,179,143				27,761
	Agency mortgage-backed	441,749				—				441,749				—
	Non-agency mortgage-backed	104,771				—				104,771				—
	Commercial mortgage-backed	325,729				—				325,729				—
	Asset-backed	18,027				—				18,027				—
	Total fixed maturity investments	4,433,517				885,152				3,520,604				27,761
	Short term investments	905,477				—				905,477				—
	Equity investments trading	50,560				50,560				—				—
	Other investments
	Private equity partnerships	367,909				—				—				367,909
	Senior secured bank loan funds	257,870				—				237,815				20,055
	Catastrophe bonds	70,999				—				70,999				—
	Non-U.S. fixed income funds	28,862				—				28,862				—
	Hedge funds	21,344				—				14,782				6,562
	Miscellaneous other investments	2,000				—				—				2,000
	Total other investments	748,984				—				352,458				396,526
	Other assets and (liabilities)
	Assumed and ceded (re)insurance contracts	2,115				—				—				2,115
	Derivatives (1)	3,312				707				(6,293		)		8,898
	Other	10,644				(6,869		)		—				17,513
	Total other assets and (liabilities)	16,071				(6,162		)		(6,293		)		28,526
		$	6,154,609			$	929,550			$	4,772,246			$	452,813

(1) See "Note 11. Derivative Instruments" for additional information related to the fair value by type of contract, of derivatives entered into by the Company.

Schedule Of Quantitative Information Used As Level 3 Inputs

Below is a summary of quantitative information regarding the significant observable and unobservable inputs (Level 3) used in determining the fair value of assets and liabilities measured at fair value on a recurring basis:

	At March 31, 2012	Fair Value (Level 3)				Valuation Technique		Unobservable (U) and Observable (O) Inputs		Low				High				Weighted Average or Actual
	Fixed maturity investments
	Corporate	$	17,584			Discounted cash flow ("DCF")		Credit spread (U)		n/a				n/a				4.1	%
								Illiquidity premium (U)		n/a				n/a				1.0	%
								Risk-free rate (O)		n/a				n/a				0.2	%
								Dividend rate (O)		n/a				n/a				5.9	%
		10,254				Internal valuation model		Private transaction (U)		n/a				n/a				See below
	Total fixed maturity investments	27,838
	Other investments
	Private equity partnerships	389,451				Net asset valuation		Estimated performance (U)		(6.0		)%		64.4		%		8.4	%
	Senior secured bank loan funds	21,000				Net asset valuation		Estimated performance (U)		n/a				n/a				2.1	%
	Hedge funds	6,746				Net asset valuation		Estimated performance (U)		0.0		%		0.7		%		0.2	%
	Miscellaneous other investments	1,340				DCF		Illiquidity premium (U)		n/a				n/a				1.0	%
								Risk-free rate (O)		n/a				n/a				0.5	%
								Credit spread (U)		n/a				n/a				7.5	%
	Total other investments	418,537
	Other assets and (liabilities)
	Assumed and ceded (re)insurance contracts	6,163				Internal valuation model		Net premiums written (O)		—				$6.0 million				See below
								Contract period (O)		183 days				365 days				See below
								Net reserve for claims and claim expenses (U)		—				—				See below
	Weather and energy related derivatives	26,565				Spread option; Quanto; Black Scholes; Simulation		Correlation (U)		0				1				See below
								Volatility (U)		7.0		%		350.0		%		See below
								Commodity curve (U)		$	1.77			$	66.00			See below
								Weather curve (U)		19				5,000				See below
								Counterparty default risk (U)		0.0		%		22.5		%		See below
	Other	14,167				Net asset valuation		Estimated performance (U)		n/a				n/a				See below
		1,250				Internal valuation model		Private transaction (U)		n/a				n/a				See below
	Total other assets and (liabilities)	48,145
		$	494,520

Reconciliation Of Assets And Liabilities Measured At Fair Value On A Recurring Basis Using Level 3 Inputs

Below is a reconciliation of the beginning and ending balances, for the periods shown, of assets and liabilities measured at fair value on a recurring basis using Level 3 inputs. Interest and dividend income are included in net investment income and are excluded from the reconciliation.

		Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
		Fixed maturity investments, trading				Other investments				Other assets and (liabilities)				Total
	Balance – January 1, 2012	$	27,761			$	396,526			$	28,526			$	452,813
	Total unrealized gains (losses)
	Included in net investment income	77				29,107				—				29,184
	Included in other loss	—				—				18,563				18,563
	Total realized gains
	Included in net investment income	—				—				—				—
	Included in other loss	—				—				(55,308		)		(55,308		)
	Total foreign exchange losses	—				730				(377		)		353
	Purchases	—				12,689				9,281				21,970
	Sales	—				—				(13,431		)		(13,431		)
	Settlements	—				(20,515		)		60,891				40,376
	Net transfers into Level 3	—				—				—				—
	Balance – March 31, 2012	$	27,838			$	418,537			$	48,145			$	494,520
	Change in unrealized gains (losses) for the period included in earnings for assets held at the end of the period included in net investment income	$	77			$	29,107			$	—			$	29,184
	Change in unrealized gains (losses) for the period included in earnings for assets held at the end of the period included in other loss	$	—			$	—			$	10,513			$	10,513

		Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
		Fixed maturity investments trading				Other investments				Other assets  and (liabilities)				Total
	Balance – January 1, 2011	$	21,785			$	362,102			$	16,499			$	400,386
	Total unrealized gains (losses)
	Included in net investment income	41				23,757				—				23,798
	Included in other income	—				—				40,068				40,068
	Total realized gains
	Included in net investment income	—				—				—				—
	Included in other income	—				—				10,955				10,955
	Total foreign exchange losses	—				1,369				(51		)		1,318
	Purchases	—				17,465				1,631				19,096
	Sales	—				—				(4,160		)		(4,160		)
	Settlements	—				(22,878		)		3,438				(19,440		)
	Net transfers into Level 3	—				—				—				—
	Balance – March 31, 2011	$	21,826			$	381,815			$	68,380			$	472,021
	Change in unrealized gains (losses) for the period included in earnings for assets held at the end of the period included in net investment income	$	41			$	23,757			$	—			$	23,798
	Change in unrealized gains (losses) for the period included in earnings for assets held at the end of the period included in other income	$	—			$	—			$	45,474			$	45,474

Schedule Of The Balances The Company Has Elected To Account For At Fair Value

Below is a summary of the balances the Company has elected to account for at fair value:

		March 31, 2012				December 31, 2011
	Other investments	$	806,782			$	748,984
	Other assets	$	21,580			$	19,628

Schedule Of Other Investments Measured Using Net Asset Valuations

The table below shows the Company’s portfolio of other investments measured using net asset valuations:

	At March 31, 2012	Fair Value				Unfunded Commitments				Redemption Frequency		Redemption Notice Period (Minimum Days)		Redemption Notice Period (Maximum Days)
	Private equity partnerships	$	389,451			$	100,120			See below		See below		See below
	Senior secured bank loan funds	266,141				5,115				See below		See below		See below
	Non-U.S. fixed income funds	31,713				—				Bi-monthly		5		20
	Hedge funds	22,310				—				Annually, Bi-annually		45		90
	Total other investments measured using net asset valuations	$	709,615			$	105,235

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- Definition

Tabular disclosure of the fair value measurement of assets using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets) and gains or losses recognized in other comprehensive income, and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issuances, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs), by class of asset.

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Tabular disclosure of the fair value of investees that calculate net asset value per share (including by unit, membership interest, or other equity (ownership interest) unit measure) (alternative investments), whether measured at fair value on a recurring or nonrecurring basis, by major category of assets and liabilities (as defined), including, for example, (i) fair value measurements at the reporting date, (ii) the level within the fair value hierarchy in which the fair value measurements fall, (iii) a reconciliation of beginning and ending balances for those alternative investments that are measured at fair value using unobservable inputs (Level 3 - fair value hierarchy fair value measurement inputs), (iv) the inputs and valuation techniques used to measure fair value, (v) a discussion of changes to valuation techniques and inputs, if any, during the period, (vi) a description of the nature and risk associated with the alternative investments, and (vii) a discussion of the probability that any of the alternative investments are to be sold.

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Tabular disclosure of the fair value measurement of assets and liabilities which includes [financial] instruments measured at fair value that are classified in stockholders' equity. Such assets and liabilities may be measured on a recurring or nonrecurring basis. The disclosures which may be required or desired include: (1) for assets and liabilities measured on a recurring basis, disclosure may include: (a) the fair value measurements at the reporting date; (b) the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets or liabilities (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3); (c) for fair value measurements using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (i) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets), and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (ii) purchases, sales, issuances, and settlements (net); (iii) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs); (d) the amount of the total gains or losses for the period in subparagraph (c) (i) above included in earnings (or changes in net assets) that are attributable to the change in unrealized gains or losses relating to those assets and liabilities still held at the reporting date and a description of where those unrealized gains or losses are reported in the statement of income (or activities); (e) the valuation technique(s) used to measure fair value and a discussion of changes in valuation techniques, if any, during the period and (2) for assets and liabilities that are measured at fair value on a nonrecurring basis (for example, impaired assets) disclosure may include, in addition to (a) above: (a) the reasons for the fair value measurements recorded; (b) the same as (b) above; (c) for fair value measurements using significant unobservable inputs (Level 3), a description of the inputs and the information used to develop the inputs; and (d) the valuation technique(s) used to measure fair value and a discussion of changes, if any, in the valuation technique(s) used to measure similar assets and/or liabilities in prior periods. Where the quoted price in an active market for the identical liability is not available, the Level 1 input is the quoted price of an identical liability when traded as an asset.

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Tabular disclosure of the application of the fair value option for measurement and reporting of eligible financial assets and liabilities (as defined), as well as certain other eligible items (as defined) included in the statement of financial position, whether such option is elected for a single eligible item or a group of similar eligible items and is in addition to other disclosures concerning fair value which the company may be required to provide. Such disclosure might be expected to include: (1) for items included in the statement of financial position: (a) for each line item in the statement of financial position that includes an item or items for which the fair value option has been elected, provide the aggregate carrying amount of ineligible items included in each line item in the balance sheet, if any; (b) the difference between the aggregate fair value and the aggregate unpaid principal balance (assuming contractual principal amounts and fair value option elected) of: (i) loans and long-term receivables (other than securities otherwise reported at fair value) and (ii) long-term debt instruments; (c) for loans held as assets for which the fair value option has been elected: (i) the aggregate fair value of loans that are 90 days or more past due, (ii) if the policy is to recognize interest income separately from other changes in fair value, the aggregate fair value of loans in nonaccrual status, and (iii) the difference between the aggregate fair value and the aggregate unpaid principal balance for loans that are 90 days or more past due, in nonaccrual status, or both; (2) for items included in the income statement: (a) the amounts of gains and losses from fair value changes included in earnings and in which line in the income statement those gains and losses are reported whether or not combined with gains and losses from items required to be accounted for at fair value; (b) for loans and other receivables held as assets, the estimated amount of gains or losses included in earnings attributable to changes in instrument-specific credit risk; (c) for liabilities with fair values that have been significantly affected during the reporting period by changes in the instrument-specific credit risk, the estimated amount of gains and losses from fair value changes included in earnings that are attributable to changes in the instrument-specific credit risk; and (3) certain other disclosures as required or determined to be provided.

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- Definition

Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3).

+ References

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

-Topic 820

-SubTopic 10

-Publisher FASB

-Number

-Article

-Subparagraph

-Name Accounting Standards Codification

-Paragraph 1

-Section 50

-URI http://asc.fasb.org/extlink&oid=6925170&loc=d3e19190-110258

+ Details

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