General Information (Details Textuals)	9 Months Ended
Sep. 30, 2012 countries
General Information [Abstract]
Number of countries in which The Company underwrites non-correlated specialty insurance products	180

Number of countries in which company does business.

No definition available.

Name:	hcc_NumberOfCountriesInWhichCompanyDoesBusiness
Namespace Prefix:	hcc_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration