Related Party Transactions	3 Months Ended
Mar. 31, 2014
Related Party Transactions [Abstract]
Related Party Transactions	17. RELATED PARTY TRANSACTIONS *Stone Point Capital LLC* Following several private transactions occurring from May 2012 to July 2012, Trident acquired 1,350,000 of the Company’s voting ordinary shares (which now constitutes approximately 8.5% of the Company’s outstanding voting ordinary shares). On November 6, 2013, the Company appointed James D. Carey to its Board of Directors. Mr. Carey is the sole member of an entity that is one of four general partners of the entities serving as general partners for Trident, is a member of the investment committees of such general partners, and is a member and senior principal of Stone Point Capital LLC, the manager of the Trident funds. In addition, the Company has entered into certain agreements with Trident with respect to Trident’s co-investments in the Atrium Underwriting Group Limited (“Atrium”), Arden Reinsurance Company Ltd. (“Arden”), and Torus acquisitions. These include investors’ agreements and shareholders’ agreements, which provide for, among other things: (i) the Company’s right to redeem Trident’s equity interest in the Atrium/Arden and Torus transactions in cash at fair market value within the 90 days following the fifth anniversary of the Arden and Torus closings, respectively, and at any time following the seventh anniversary of the Arden and Torus closings, respectively; and (ii) Trident’s right to have its equity interests in the Atrium/Arden and Torus transactions redeemed by the Company at fair market value (which the Company may satisfy in either cash or its ordinary shares) following the seventh anniversaries of the Arden closing and Torus closing, respectively. As of March 31, 2014, the Company has included $361.1 million as part of redeemable noncontrolling interest on its balance sheet relating to these Trident co-investment transactions. Pursuant to the terms of the shareholders’ agreements, Mr. Carey serves as a Trident representative on the boards of Torus and the holding companies established in connection with the Atrium/Arden and Torus co-investment transactions. The Company has investments in two funds (carried within other investments) affiliated with entities owned by Trident. As of March 31, 2014 and December 31, 2013, the fair value of the investments in the two funds was $108.9 million and $87.7 million, respectively. During the three months ended March 31, 2014, the Company made a commitment to invest up to $20.0 million in a fund managed by Stone Point Capital LLC, but has not yet funded any part of this investment. The Company has also invested in a fund managed by Sound Point Capital, an entity in which Mr. Carey has an approximately 4% indirect ownership interest and serves as director. As of March 31, 2014 and December 31, 2013, the fair value of this investment was $21.9 million and $21.6 million, respectively. For the three months ended March 31, 2014 and 2013, the Company has recognized $0.4 million and $0.3 million, respectively, in net realized and unrealized gains in respect of this investment. *Goldman Sachs & Co.* Affiliates of Goldman Sachs & Co. (“Goldman Sachs”) own approximately 4.2% of the Company’s voting ordinary shares and 100% of the Company’s outstanding non-voting convertible ordinary shares. Sumit Rajpal, a managing director of Goldman Sachs, was appointed to the Board of Directors in connection with Goldman Sachs’ investment in the Company. As of March 31, 2014, the Company had investments in one fund (carried within other investments) affiliated with entities owned by Goldman Sachs, which had a fair value of $3.1 million. During the three months ended March 31, 2014, the Company invested £12.5 million (approximately $20.8 million) in indirect non-voting interests of two companies affiliated with Hastings Insurance Group Limited. The Company’s interests are held in accounts managed by affiliates of Goldman Sachs. Goldman Sachs affiliates have an approximately 50% interest in the Hastings companies, and Mr. Rajpal serves as a director of the entities the Company has invested in. Affiliates of Goldman Sachs own approximately 22% of Global Atlantic Financial Group (“GAFG”), which owns entities that provide reinsurance to Arden. As at March 31, 2014 and December 31, 2013, the Company’s total reinsurance recoverable from GAFG entities amounted to $302.0 million and $340.8 million, respectively. As at March 31, 2014 and December 31, 2013, reinsurance balances recoverable from a particular non-rated GAFG entity with a carrying value of $229.3 million and $256.1 million, respectively, represented 10% or more of the Company’s total non-life run-off reinsurance balances recoverable. The $229.3 million and $256.1 million recoverable from that GAFG entity at March 31, 2014 and December 31, 2013, respectively, was secured by a trust fund. The balance of $72.7 million and $84.7 million as at March 31, 2014 and December 31, 2013, respectively, was recoverable from GAFG entities rated A- and higher.

17. RELATED PARTY TRANSACTIONS

Stone Point Capital LLC

Following several private transactions occurring from May 2012 to July 2012, Trident acquired 1,350,000 of the Company’s voting ordinary shares (which now constitutes approximately 8.5% of the Company’s outstanding voting ordinary shares). On November 6, 2013, the Company appointed James D. Carey to its Board of Directors. Mr. Carey is the sole member of an entity that is one of four general partners of the entities serving as general partners for Trident, is a member of the investment committees of such general partners, and is a member and senior principal of Stone Point Capital LLC, the manager of the Trident funds.

In addition, the Company has entered into certain agreements with Trident with respect to Trident’s co-investments in the Atrium Underwriting Group Limited (“Atrium”), Arden Reinsurance Company Ltd. (“Arden”), and Torus acquisitions. These include investors’ agreements and shareholders’ agreements, which provide for, among other things: (i) the Company’s right to redeem Trident’s equity interest in the Atrium/Arden and Torus transactions in cash at fair market value within the 90 days following the fifth anniversary of the Arden and Torus closings, respectively, and at any time following the seventh anniversary of the Arden and Torus closings, respectively; and (ii) Trident’s right to have its equity interests in the Atrium/Arden and Torus transactions redeemed by the Company at fair market value (which the Company may satisfy in either cash or its ordinary shares) following the seventh anniversaries of the Arden closing and Torus closing, respectively. As of March 31, 2014, the Company has included $361.1 million as part of redeemable noncontrolling interest on its balance sheet relating to these Trident co-investment transactions. Pursuant to the terms of the shareholders’ agreements, Mr. Carey serves as a Trident representative on the boards of Torus and the holding companies established in connection with the Atrium/Arden and Torus co-investment transactions.

The Company has investments in two funds (carried within other investments) affiliated with entities owned by Trident. As of March 31, 2014 and December 31, 2013, the fair value of the investments in the two funds was $108.9 million and $87.7 million, respectively. During the three months ended March 31, 2014, the Company made a commitment to invest up to $20.0 million in a fund managed by Stone Point Capital LLC, but has not yet funded any part of this investment.

The Company has also invested in a fund managed by Sound Point Capital, an entity in which Mr. Carey has an approximately 4% indirect ownership interest and serves as director. As of March 31, 2014 and December 31, 2013, the fair value of this investment was $21.9 million and $21.6 million, respectively. For the three months ended March 31, 2014 and 2013, the Company has recognized $0.4 million and $0.3 million, respectively, in net realized and unrealized gains in respect of this investment.

Goldman Sachs & Co.

Affiliates of Goldman Sachs & Co. (“Goldman Sachs”) own approximately 4.2% of the Company’s voting ordinary shares and 100% of the Company’s outstanding non-voting convertible ordinary shares. Sumit Rajpal, a managing director of Goldman Sachs, was appointed to the Board of Directors in connection with Goldman Sachs’ investment in the Company. As of March 31, 2014, the Company had investments in one fund (carried within other investments) affiliated with entities owned by Goldman Sachs, which had a fair value of $3.1 million. During the three months ended March 31, 2014, the Company invested £12.5 million (approximately $20.8 million) in indirect non-voting interests of two companies affiliated with Hastings Insurance Group Limited. The Company’s interests are held in accounts managed by affiliates of Goldman Sachs. Goldman Sachs affiliates have an approximately 50% interest in the Hastings companies, and Mr. Rajpal serves as a director of the entities the Company has invested in.

Affiliates of Goldman Sachs own approximately 22% of Global Atlantic Financial Group (“GAFG”), which owns entities that provide reinsurance to Arden. As at March 31, 2014 and December 31, 2013, the Company’s total reinsurance recoverable from GAFG entities amounted to $302.0 million and $340.8 million, respectively. As at March 31, 2014 and December 31, 2013, reinsurance balances recoverable from a particular non-rated GAFG entity with a carrying value of $229.3 million and $256.1 million, respectively, represented 10% or more of the Company’s total non-life run-off reinsurance balances recoverable. The $229.3 million and $256.1 million recoverable from that GAFG entity at March 31, 2014 and December 31, 2013, respectively, was secured by a trust fund. The balance of $72.7 million and $84.7 million as at March 31, 2014 and December 31, 2013, respectively, was recoverable from GAFG entities rated A- and higher.