v2.4.0.6
Net Investment Income (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Schedule of Investment Income, Reported Amounts, by Category [Line Items]        
Gross investment income $ 18,630 $ 14,817 $ 49,827 $ 42,651
Less: Investment expenses and interest expense on securities sold under agreement to repurchase 201 361 536 836
Net investment income 18,429 14,456 49,291 41,815
Fixed maturities
       
Schedule of Investment Income, Reported Amounts, by Category [Line Items]        
Gross investment income 18,185 13,601 47,908 39,577
Equity securities
       
Schedule of Investment Income, Reported Amounts, by Category [Line Items]        
Gross investment income 325 141 823 427
Cash and cash equivalents
       
Schedule of Investment Income, Reported Amounts, by Category [Line Items]        
Gross investment income $ 120 $ 1,075 $ 1,096 $ 2,647