v2.4.0.6
COMMITMENTS AND CONTINGENCIES (DETAILS 2)
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
COMMITMENTS AND CONTINGENCIES [Abstract]      
Disclosure limit - concentration risk 10.00% 10.00% 10.00%
Reinsurance recoverable on unpaid and paid losses | Reinsurer [Member] | Largest balance [Member]
     
COMMITMENTS AND CONTINGENCIES [Abstract]      
Concentration risk, percentage of total 13.00% 13.00%  
Reinsurance recoverable on unpaid and paid losses | Reinsurer [Member] | Second largest balance [Member]
     
COMMITMENTS AND CONTINGENCIES [Abstract]      
Concentration risk, percentage of total 10.00% 11.00%  
Reinsurance recoverable on unpaid and paid losses | Reinsurer [Member] | Third largest balance [Member]
     
COMMITMENTS AND CONTINGENCIES [Abstract]      
Concentration risk, percentage of total 10.00% 11.00%  
Reinsurance recoverable on unpaid and paid losses | Reinsurer [Member] | Top ten balances [Member] | A [Member]
     
COMMITMENTS AND CONTINGENCIES [Abstract]      
Concentration risk, percentage of total   70.00%  
Reinsurance recoverable on unpaid and paid losses | Reinsurer [Member] | Top ten balances [Member] | A Plus [Member]
     
COMMITMENTS AND CONTINGENCIES [Abstract]      
Concentration risk, percentage of total 70.00%    
Gross Premiums Written [Member] | Top three broker balances [Member]
     
COMMITMENTS AND CONTINGENCIES [Abstract]      
Concentration risk, percentage of total 63.00% 62.00% 62.00%
Gross Premiums Written [Member] | Top three broker balances [Member] | Aon [Member]
     
COMMITMENTS AND CONTINGENCIES [Abstract]      
Concentration risk, percentage of total 27.00% 25.00% 26.00%
Gross Premiums Written [Member] | Top three broker balances [Member] | Marsh [Member]
     
COMMITMENTS AND CONTINGENCIES [Abstract]      
Concentration risk, percentage of total 23.00% 24.00% 23.00%
Gross Premiums Written [Member] | Top three broker balances [Member] | Willis [Member]
     
COMMITMENTS AND CONTINGENCIES [Abstract]      
Concentration risk, percentage of total 13.00% 13.00% 13.00%