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Noncontrolling Interests (Schedule Of Redeemable Noncontrolling Interest) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Activity in redeemable noncontrolling interest
Balance, Beginning	$ 1,131,708
Comprehensive income:
Net income attributable to redeemable noncontrolling interest	111,050	$ 153,538	$ 151,144
Balance, Ending	1,045,964	1,131,708
DaVinciRe Holdings Ltd.
Activity in redeemable noncontrolling interest
Balance, Beginning	1,037,306	1,063,368
Redemption of shares from redeemable noncontrolling interests	(212,750)	(224,455)
Sale of shares to redeemable noncontrolling interest	0	48,576
Comprehensive income:
Net income attributable to redeemable noncontrolling interest	106,399	149,817	150,581
Balance, Ending	930,955	1,037,306	1,063,368
Medici
Activity in redeemable noncontrolling interest
Balance, Beginning	94,402	36,492
Redemption of shares from redeemable noncontrolling interests	(20,117)	(3,075)
Sale of shares to redeemable noncontrolling interest	36,073	57,264
Comprehensive income:
Net income attributable to redeemable noncontrolling interest	4,651	3,721	617
Balance, Ending	115,009	94,402	36,492
Angus Fund
Comprehensive income:
Net income attributable to redeemable noncontrolling interest	$ 0	$ 0	$ (54)

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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).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
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Amount of Net Income (Loss) attributable to redeemable noncontrolling interest.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
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Amount of increase in noncontrolling interest from subsidiary issuance of equity interests to noncontrolling interest holders.

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As of the reporting date, the aggregate carrying amount of all noncontrolling interests which are redeemable by the (parent) entity (1) at a fixed or determinable price on a fixed or determinable date, (2) at the option of the holder of the noncontrolling interest, or (3) upon occurrence of an event that is not solely within the control of the (parent) entity. This item includes noncontrolling interest holder's ownership (or holders' ownership) regardless of the type of equity interest (common, preferred, other) including all potential organizational (legal) forms of the investee entity.

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