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Reinsurance (Narrative or Textuals) (Details) (USD $)
Mar. 31, 2015
Dec. 31, 2014
Reinsurance [Abstract]    
Recoverables related to Spanish surety bonds $ 86,300,000hcc_RecoverablesRelatedToSpanishSuretyBonds  
Paid loss recoverables related to Spanish surety bonds 43,400,000hcc_PaidLossRecoverablesRelatedToSpanishSuretyBonds  
Recoverables in dispute from run-off reinsurers related to Spanish surety bonds 41,500,000hcc_RecoverablesInDisputeFromRunOffReinsurersRelatedToSpanishSuretyBonds  
Paid loss recoverables in dispute from run-off reinsurers related to Spanish surety bonds 36,800,000hcc_PaidLossRecoverablesInDisputeRelatedToSpanishSuretyBonds  
Reserve for uncollectible reinsurance $ 1,500,000hcc_ReserveForUncollectibleReinsurance $ 1,500,000hcc_ReserveForUncollectibleReinsurance