v2.4.0.6
SEGMENT INFORMATION (DETAILS 2) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Revenues From External Customers By Geographic Location Of Subsidiary [Line Items]      
Gross premiums written $ 4,096,153 $ 3,750,536 $ 3,587,295
Bermuda [Member]
     
Revenues From External Customers By Geographic Location Of Subsidiary [Line Items]      
Gross premiums written 822,237 822,530 802,577
Europe [Member]
     
Revenues From External Customers By Geographic Location Of Subsidiary [Line Items]      
Gross premiums written 1,493,692 1,203,091 1,057,427
United States [Member]
     
Revenues From External Customers By Geographic Location Of Subsidiary [Line Items]      
Gross premiums written $ 1,780,224 $ 1,724,915 $ 1,727,291