XML 17 R33.htm IDEA: XBRL DOCUMENT v2.4.0.6
Investments (Narrative) (Details) (USD $)
In Thousands, unless otherwise specified
9 Months Ended
Sep. 30, 2012
funds
Dec. 31, 2011
Sep. 30, 2012
Hedge Funds [Member]
Sep. 30, 2012
Investments with redemption restrictions [Member]
Sep. 30, 2012
Investments with redemption restrictions [Member]
Hedge Funds [Member]
Sep. 30, 2012
Investments without redemption restrictions [Member]
Sep. 30, 2012
Investments without redemption restrictions [Member]
Hedge Funds [Member]
Sep. 30, 2012
Minimum [Member]
Investments with redemption restrictions [Member]
Sep. 30, 2012
Minimum [Member]
Investments without redemption restrictions [Member]
Hedge Funds [Member]
Sep. 30, 2012
Maximum [Member]
Investments with redemption restrictions [Member]
Sep. 30, 2012
Maximum [Member]
Investments without redemption restrictions [Member]
Hedge Funds [Member]
Sep. 30, 2012
In favor of ceding companies, other counterparties, or government authorities
Dec. 31, 2011
In favor of ceding companies, other counterparties, or government authorities
Sep. 30, 2012
Pledged as collateral for letter of credity facility
Dec. 31, 2011
Pledged as collateral for letter of credity facility
Pledged assets:                              
Pledged assets                       $ 2,076,294 $ 2,029,138 $ 1,047,023 $ 1,044,236
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]                              
Number of funds held 23                            
Other invested assets trading, at fair value $ 564,702 $ 540,409 $ 440,507 $ 151,363 $ 27,168 $ 413,339 $ 413,339                
Other invested assets, percentage of total portfolio 6.40%                            
Period of redemption restriction               1 year   3 years          
Required notification period for redemption                 P30D            
Gate trigger, percentage                 15.00%   25.00%