XML 84 R34.htm IDEA: XBRL DOCUMENT v2.4.0.6
Investments (Details) (USD $)
 3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Major Categories Of Investment Income Net of Expenses [Line Items]        
Investment Revenue $ 406,601,000 $ 275,048,000 $ 1,094,696,000 $ 997,840,000
Investment Income Investment Expense 9,820,000 6,838,000 28,641,000 21,154,000
Investment income, net of related expenses 396,781,000 268,210,000 1,066,055,000 976,686,000
Availableforsale Securities Member
        
Major Categories Of Investment Income Net of Expenses [Line Items]        
Investment Revenue 221,212,000 190,990,000 633,110,000 566,581,000
Mortgage Loans On Real Estate Member
        
Major Categories Of Investment Income Net of Expenses [Line Items]        
Investment Revenue 26,938,000 14,474,000 67,258,000 41,801,000
Policy Loans Member
        
Major Categories Of Investment Income Net of Expenses [Line Items]        
Investment Revenue 16,519,000 16,454,000 49,637,000 49,549,000
Funds Withheld At Interest [Member]
        
Major Categories Of Investment Income Net of Expenses [Line Items]        
Investment Revenue 127,855,000 41,267,000 305,861,000 306,028,000
Short Term Investments Member
        
Major Categories Of Investment Income Net of Expenses [Line Items]        
Investment Revenue 960,000 393,000 3,027,000 2,201,000
Other Aggregated Investments Member
        
Major Categories Of Investment Income Net of Expenses [Line Items]        
Investment Revenue $ 13,117,000 $ 11,470,000 $ 35,803,000 $ 31,680,000