XML 130 R85.htm IDEA: XBRL DOCUMENT v2.4.0.6
Reinsurance (List of Direct, Assumed, and Ceded Reinsurance Amounts) (Details) (USD $)
 3 Months Ended 12 Months Ended 5 Months Ended
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2010
Sep. 30, 2010
Jun. 30, 2010
Mar. 31, 2010
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Dec. 31, 2011
Excess And Surplus Operations [Member]
Premiums written:                        
Direct                 $ 1,725,393,000 $ 1,634,415,000 $ 1,657,142,000  
Assumed                 51,515,000 25,254,000 22,784,000 24,100,000
Ceded premiums written                 (291,559,000) (269,128,000) (257,271,000)  
Net                 1,485,349,000 1,390,541,000 1,422,655,000  
Premiums earned:                        
Direct                 1,693,021,000 1,654,301,000 1,657,911,000  
Assumed                 29,011,000 26,619,000 21,501,000  
Ceded premiums earned                 (282,719,000) (264,322,000) (248,365,000)  
Net 373,427,000 358,963,000 355,580,000 351,343,000 353,497,000 354,709,000 352,190,000 356,202,000 1,439,313,000 1,416,598,000 1,431,047,000  
Losses and loss expenses incurred:                        
Direct                 1,499,340,000 1,102,326,000 1,065,594,000  
Assumed                 20,788,000 14,994,000 14,794,000  
Ceded losses and loss expenses incurred                 (445,141,000) (135,202,000) (108,483,000)  
Net                 1,074,987,000 982,118,000 971,905,000  
Increase Decrease In Assumed Premiums                 26,300,000      
Increase in catastrophe losses                 62,300,000      
Catastrophe losses                 118,800,000      
Hurricane Irene losses on a net basis                 40,200,000      
Hurricane Irene losses on a gross basis                 $ 47,100,000