v2.4.0.8
DERIVATIVE INSTRUMENTS (DETAILS 4) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Unrealized and Realized Gains (Losses) Recognized in Earnings for Derivatives Not Designated As Hedges [Line Items]        
Unrealized and realized gains (losses) recognized in earnings for derivatives not designated as hedges $ 5,443 $ 6,898 $ 15,095 $ 14,470
Foreign Exchange Forward Contracts [Member] | Net Realized Investment Gains (Losses) [Member] | Investment Portfolio [Member]
       
Unrealized and Realized Gains (Losses) Recognized in Earnings for Derivatives Not Designated As Hedges [Line Items]        
Unrealized and realized gains (losses) recognized in earnings for derivatives not designated as hedges 10,128 6,697 17,292 815
Foreign Exchange Forward Contracts [Member] | Foreign Exchange Gains (Losses) [Member] | Underwriting Portfolio [Member]
       
Unrealized and Realized Gains (Losses) Recognized in Earnings for Derivatives Not Designated As Hedges [Line Items]        
Unrealized and realized gains (losses) recognized in earnings for derivatives not designated as hedges $ (4,685) $ 201 $ (2,197) $ 13,655