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Schedule 5 Valuation and Qualifying Accounts
12 Months Ended
Dec. 31, 2011
Valuation and Qualifying Accounts [Abstract]  
Schedule of Valuation and Qualifying Accounts Disclosure [Text Block]
         SCHEDULE 5
            
 HCC INSURANCE HOLDINGS, INC. AND SUBSIDIARIES 
            
 VALUATION AND QUALIFYING ACCOUNTS 
 (in thousands) 
            
   2011 2010 2009 
            
Allowance for doubtful accounts          
            
 Balance at beginning of year $ 3,639 $ 4,280 $ 5,380 
 Provision expense   362   1,238   902 
 Sale of subsidiary   -   -   (806) 
 Amounts written off and other   (333)   (1,879)   (1,196) 
  Balance at end of year $ 3,668 $ 3,639 $ 4,280