Represents a sale (new stock issuance) by a subsidiary to noncontrolling interests (third parties, parties directly or indirectly unrelated to parent) during the period. The capital transaction by subsidiary does not result in a loss of control by the parent, but does effect a change in total (consolidated) equity attributable to the parent.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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Decrease in noncontrolling interest (for example, but not limited to, redeeming or purchasing the interests of noncontrolling shareholders, issuance of shares (interests) by the non-wholly owned subsidiary to the parent entity for other than cash, and a buyback of shares (interest) by the non-wholly owned subsidiary from the noncontrolling interests).

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Amount of Net Income (Loss) attributable to redeemable noncontrolling interest.

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Noncontrolling Interests (Schedule Of Redeemable Noncontrolling Interest) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended						12 Months Ended	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014 DaVinciRe	Mar. 31, 2013 DaVinciRe	Mar. 31, 2014 Medici	Mar. 31, 2013 Medici	Dec. 31, 2013 Medici	Mar. 31, 2014 Angus Fund	Mar. 31, 2013 Angus Fund	Mar. 31, 2014 Angus	Dec. 31, 2013 Angus	Sep. 30, 2013 Angus
Redeemable Noncontrolling Interest [Line Items]
Equity Method Investment, Ownership Percentage										40.40%	42.50%	38.80%
Activity in redeemable noncontrolling interest
Beginning balance	$ 1,099,860		$ 1,063,368	$ 968,259	$ 36,492	$ 0	$ 0
Redemption of shares from redeemable noncontrolling interest			(218,879)	(186,231)	(1,875)	0	(1,325)
Sale of shares to redeemable noncontrolling interests			9,722	54,927	55,385	0
Net income attributable to redeemable noncontrolling interest	42,768	38,607	41,180	38,815	1,588	0		0	(208)
Ending balance	$ 986,981		$ 895,391	$ 875,770	$ 91,590	$ 0	$ 36,492