Reinsurance	9 Months Ended
Sep. 30, 2018
Insurance [Abstract]
Reinsurance	Reinsurance The Company purchases retrocession and reinsurance to limit and diversify the Company’s risk exposure and increase its own reinsurance and insurance underwriting capacity. These agreements provide for recovery of a portion of losses and loss adjustment expenses from reinsurers. As is the case with most reinsurance contracts, the Company remains liable to the extent that reinsurers do not meet their obligations under these agreements and therefore, in line with its risk management objectives, the Company evaluates the financial condition of its reinsurers and monitors concentrations of credit risk. The total amount recoverable by the Company from reinsurers as at September 30, 2018 was $1,767.1 million (December 31, 2017 — $1,515.2 million) of which $1,237.8 million was uncollateralized (December 31, 2017 — $1,001.9 million). As at September 30, 2018 16.8% (December 31, 2017 — 17.0%) of the Company’s uncollateralized reinsurance recoverables were with Munich Re which is rated A+ by A.M Best and AA- by S&P, 14.1% (December 31, 2017 — 13.8%) with Lloyd’s Syndicates which are rated A by A.M Best and A+ by S&P and 8.9% (December 31, 2017 — 7.6% with Aioi Nissay Dowa Insurance Company) with Scor Global P&C SE which is rated A+ by A.M Best and AA- by S&P. These are the Company’s largest exposures to individual reinsurers. The Company has made no provision for doubtful debts from any of its reinsurers as at September 30, 2018.

Reinsurance

The Company purchases retrocession and reinsurance to limit and diversify the Company’s risk exposure and increase its own reinsurance and insurance underwriting capacity. These agreements provide for recovery of a portion of losses and loss adjustment expenses from reinsurers. As is the case with most reinsurance contracts, the Company remains liable to the extent that reinsurers do not meet their obligations under these agreements and therefore, in line with its risk management objectives, the Company evaluates the financial condition of its reinsurers and monitors concentrations of credit risk. The total amount recoverable by the Company from reinsurers as at September 30, 2018 was $1,767.1 million (December 31, 2017 — $1,515.2 million) of which $1,237.8 million was uncollateralized (December 31, 2017 — $1,001.9 million). As at September 30, 2018 16.8% (December 31, 2017 — 17.0%) of the Company’s uncollateralized reinsurance recoverables were with Munich Re which is rated A+ by A.M Best and AA- by S&P, 14.1% (December 31, 2017 — 13.8%) with Lloyd’s Syndicates which are rated A by A.M Best and A+ by S&P and 8.9% (December 31, 2017 — 7.6% with Aioi Nissay Dowa Insurance Company) with Scor Global P&C SE which is rated A+ by A.M Best and AA- by S&P. These are the Company’s largest exposures to individual reinsurers. The Company has made no provision for doubtful debts from any of its reinsurers as at September 30, 2018.