Related party transactions	6 Months Ended
Jun. 30, 2016
Related Party Transactions [Abstract]
Related party transactions	Related party transactions The transactions listed below are classified as related party transactions as principals and/or directors of each counterparty are members of the Company's board of directors. Aquiline Capital Partners, LLC and its related companies ("Aquiline"), which own 828,458 shares in the Company, have two employees on the Company's Board of Directors who do not receive compensation from the Company, are shareholders of Group Ark Insurance Holdings Ltd. ("Group Ark"). Christopher E. Watson, a director of the Company, serves as a director of Group Ark. Pursuant to reinsurance agreements with a subsidiary of Group Ark, the Company recognized gross premiums written during the three and six months ended June 30, 2016 of $65 (2015: $526) and $1,971 (2015: $2,396), respectively with $1,041 included in premiums receivable at June 30, 2016 (December 31, 2015: $82). The Company also recognized reinsurance premiums ceded during the three and six months ended June 30, 2016 of $(17) (2015: $(28)) and $nil (2015: $1), respectively and had reinsurance balances payable of $4 at June 30, 2016 (December 31, 2015: $4). The Company recorded $748 of loss reserves recoverable at June 30, 2016 (December 31, 2015: $790). Earned premium adjustments were recorded during the three and six months ended June 30, 2016 of $473 (2015: $534) and $999 (2015: $1,317), respectively. On November 24, 2009, the Company entered into an Investment Management Agreement with Conning, Inc. ("Conning") to manage a portion of the Company's investment portfolio. Aquiline acquired Conning on June 16, 2009. Jeffrey W. Greenberg, a director of the Company, serves as a director of Conning Holdings Corp., the parent company of Conning. During the three months ended September 30, 2015, Aquiline disposed of its investment in Conning. Therefore, effective September 30, 2015, Conning was no longer a related party. Investment management fees earned by Conning for the three and six months ended June 30, 2015 were $120 and $405, respectively. On December 20, 2011, the Company entered into an Agreement with Aquiline Capital and Aquiline II General Partner pursuant to which the Company has assumed 100% of Aquiline Capital's interest in the Aquiline II Partnership representing a total capital commitment of $50,000 (the "Aquiline II Commitment"), as a limited partner in the Partnership (the "Transferred Interest"). On October 2, 2014, the Company assumed an additional investment in the Aquiline II Partnership as part of the Western World acquisition representing a total capital commitment of $10,000. Messrs. Greenberg and Watson, directors of the Company, serve as managing principal and senior principal, respectively, of Aquiline Capital. For both the three and six months ended June 30, 2016, the Company incurred $440 in partnership fees (2015:$489 and $937, respectively) and made capital contributions of $nil and $575 (2015: $3,415 and $8,977), respectively. On November 7, 2014, the Company entered into a Subscription Agreement (the "Subscription Agreement") with the Aquiline III General Partner pursuant to which the Company is committing and agreeing to purchase limited partnership or other comparable limited liability equity interests (the "Limited Partnership Interests") in the "Aquiline III Partnership, and/or one or more Alternative Investment Vehicles and Intermediate Entities (together with the Aquiline III Partnership, the "Fund" or the "Entities") with a capital commitment (the "Aquiline III Commitment") in an amount equal to $100,000, as a limited partner in the Aquiline III Partnership. For both the three and six months ended June 30, 2016, the Company incurred $575 in partnership fees (2015: $369 and $1,239, respectively) and made capital contributions of $15,732 (2015: $nil and $14,138, respectively). On November 24, 2015, Western World, a subsidiary of the Company, entered into a Stock Purchase Agreement (the “Agreement”) with WRM America Indemnity Holding Company, LLC (the “Seller”), a company owned in part by Aquiline Financial Services Fund LP and Aquiline Financial Services Fund (Offshore) LP (collectively, “Aquiline”), pursuant to which Western World will purchase all of the issued and outstanding shares of capital stock of WRM America Indemnity Company, Inc. ("WRMAI"), a New York stock property and casualty insurance company. Under the terms of the Agreement, Western World has agreed to pay an amount equal to the sum of: (i) the amount of policyholder surplus of WRMAI as of the Closing Date, as shown on the Closing Balance Sheet, and (ii) $3,750. The Agreement includes customary indemnities and conditions to closing including the approval by The New York Department of Financial Services of the acquisition of control of WRMAI by Western World. Certain shareholders of the Company and their affiliates, as well as employers of entities associated with directors or officers have purchased insurance and/or reinsurance from the Company in the ordinary course of business. The Company believes these transactions were settled for arm's length consideration.

Related party transactions

The transactions listed below are classified as related party transactions as principals and/or directors of each counterparty are members of the Company's board of directors.

Aquiline Capital Partners, LLC and its related companies ("Aquiline"), which own 828,458 shares in the Company, have two employees on the Company's Board of Directors who do not receive compensation from the Company, are shareholders of Group Ark Insurance Holdings Ltd. ("Group Ark"). Christopher E. Watson, a director of the Company, serves as a director of Group Ark. Pursuant to reinsurance agreements with a subsidiary of Group Ark, the Company recognized gross premiums written during the three and six months ended June 30, 2016 of $65 (2015: $526) and $1,971 (2015: $2,396), respectively with $1,041 included in premiums receivable at June 30, 2016 (December 31, 2015: $82). The Company also recognized reinsurance premiums ceded during the three and six months ended June 30, 2016 of $(17) (2015: $(28)) and $nil (2015: $1), respectively and had reinsurance balances payable of $4 at June 30, 2016 (December 31, 2015: $4). The Company recorded $748 of loss reserves recoverable at June 30, 2016 (December 31, 2015: $790). Earned premium adjustments were recorded during the three and six months ended June 30, 2016 of $473 (2015: $534) and $999 (2015: $1,317), respectively.

On November 24, 2009, the Company entered into an Investment Management Agreement with Conning, Inc. ("Conning") to manage a portion of the Company's investment portfolio. Aquiline acquired Conning on June 16, 2009. Jeffrey W. Greenberg, a director of the Company, serves as a director of Conning Holdings Corp., the parent company of Conning. During the three months ended September 30, 2015, Aquiline disposed of its investment in Conning. Therefore, effective September 30, 2015, Conning was no longer a related party. Investment management fees earned by Conning for the three and six months ended June 30, 2015 were $120 and $405, respectively.

On December 20, 2011, the Company entered into an Agreement with Aquiline Capital and Aquiline II General Partner pursuant to which the Company has assumed 100% of Aquiline Capital's interest in the Aquiline II Partnership representing a total capital commitment of $50,000 (the "Aquiline II Commitment"), as a limited partner in the Partnership (the "Transferred Interest"). On October 2, 2014, the Company assumed an additional investment in the Aquiline II Partnership as part of the Western World acquisition representing a total capital commitment of $10,000. Messrs. Greenberg and Watson, directors of the Company, serve as managing principal and senior principal, respectively, of Aquiline Capital. For both the three and six months ended June 30, 2016, the Company incurred $440 in partnership fees (2015:$489 and $937, respectively) and made capital contributions of $nil and $575 (2015: $3,415 and $8,977), respectively.

On November 7, 2014, the Company entered into a Subscription Agreement (the "Subscription Agreement") with the Aquiline III General Partner pursuant to which the Company is committing and agreeing to purchase limited partnership or other comparable limited liability equity interests (the "Limited Partnership Interests") in the "Aquiline III Partnership, and/or one or more Alternative Investment Vehicles and Intermediate Entities (together with the Aquiline III Partnership, the "Fund" or the "Entities") with a capital commitment (the "Aquiline III Commitment") in an amount equal to $100,000, as a limited partner in the Aquiline III Partnership. For both the three and six months ended June 30, 2016, the Company incurred $575 in partnership fees (2015: $369 and $1,239, respectively) and made capital contributions of $15,732 (2015: $nil and $14,138, respectively).

On November 24, 2015, Western World, a subsidiary of the Company, entered into a Stock Purchase Agreement (the “Agreement”) with WRM America Indemnity Holding Company, LLC (the “Seller”), a company owned in part by Aquiline Financial Services Fund LP and Aquiline Financial Services Fund (Offshore) LP (collectively, “Aquiline”), pursuant to which Western World will purchase all of the issued and outstanding shares of capital stock of WRM America Indemnity Company, Inc. ("WRMAI"), a New York stock property and casualty insurance company. Under the terms of the Agreement, Western World has agreed to pay an amount equal to the sum of: (i) the amount of policyholder surplus of WRMAI as of the Closing Date, as shown on the Closing Balance Sheet, and (ii) $3,750. The Agreement includes customary indemnities and conditions to closing including the approval by The New York Department of Financial Services of the acquisition of control of WRMAI by Western World.

Certain shareholders of the Company and their affiliates, as well as employers of entities associated with directors or officers have purchased insurance and/or reinsurance from the Company in the ordinary course of business. The Company believes these transactions were settled for arm's length consideration.