General Information	9 Months Ended
Sep. 30, 2013
General Information [Abstract]
General Information	(1) General Information HCC Insurance Holdings, Inc. (HCC) and its subsidiaries (collectively we, us or our) include domestic and foreign property and casualty and life insurance companies and underwriting agencies with offices in the United States, the United Kingdom, Spain and Ireland. We underwrite a variety of largely non-correlated specialty insurance products, including property and casualty, accident and health, surety and credit product lines, in approximately 180 countries. We market our products through a network of independent agents and brokers, through managing general agents owned by the company, and directly to customers. In addition, we assume insurance written by other insurance companies. Basis of Presentation Our unaudited consolidated financial statements have been prepared in conformity with accounting principles generally accepted in the United States of America (GAAP) and include the accounts of HCC and its subsidiaries. We have made all adjustments that, in our opinion, are necessary for a fair statement of results of the interim periods, and all such adjustments are of a normal recurring nature. All significant intercompany balances and transactions have been eliminated in consolidation. The consolidated financial statements should be read in conjunction with our Annual Report on Form 10-K for the year ended December 31, 2012. The consolidated balance sheet at December 31, 2012 was derived from the audited financial statements but does not include all disclosures required by GAAP. Management must make estimates and assumptions that affect amounts reported in our consolidated financial statements and in disclosures of contingent assets and liabilities. Ultimate results could differ from those estimates.

General Information

9 Months Ended

Sep. 30, 2013

(1) General Information

HCC Insurance Holdings, Inc. (HCC) and its subsidiaries (collectively we, us or our) include domestic and foreign property and casualty and life insurance companies and underwriting agencies with offices in the United States, the United Kingdom, Spain and Ireland. We underwrite a variety of largely non-correlated specialty insurance products, including property and casualty, accident and health, surety and credit product lines, in approximately 180 countries. We market our products through a network of independent agents and brokers, through managing general agents owned by the company, and directly to customers. In addition, we assume insurance written by other insurance companies.

Basis of Presentation

Our unaudited consolidated financial statements have been prepared in conformity with accounting principles generally accepted in the United States of America (GAAP) and include the accounts of HCC and its subsidiaries. We have made all adjustments that, in our opinion, are necessary for a fair statement of results of the interim periods, and all such adjustments are of a normal recurring nature. All significant intercompany balances and transactions have been eliminated in consolidation. The consolidated financial statements should be read in conjunction with our Annual Report on Form 10-K for the year ended December 31, 2012. The consolidated balance sheet at December 31, 2012 was derived from the audited financial statements but does not include all disclosures required by GAAP.

Management must make estimates and assumptions that affect amounts reported in our consolidated financial statements and in disclosures of contingent assets and liabilities. Ultimate results could differ from those estimates.