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Quarterly Information (Details Textuals) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Quarterly Financial Data [Abstract]      
Internal Claims Department Costs $ 36.4hcc_Internalclaimsdepartmentcosts $ 32.4hcc_Internalclaimsdepartmentcosts $ 32.6hcc_Internalclaimsdepartmentcosts