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Derivative Instruments (Tables)
9 Months Ended
Sep. 30, 2012
Derivative Instruments [Abstract]  
Schedule Of Derivative Instruments In Statement Of Financial Position Fair Value
     September 30, 2012  December 31, 2011
      Notional Carrying Value/Fair Value   Notional Carrying Value/Fair Value
      Amount  Assets  Liabilities   Amount  Assets  Liabilities
Derivatives not designated as                  
 hedging instruments:                  
 Interest rate swaps(1)$ 2,236,718 $ 306,774 $ 174,741  $ 2,748,317 $ 184,842 $ 18,702
 Financial futures(1)  204,424   --   --    277,814   --   --
 Foreign currency forwards(1)  44,400   4,052   36    24,400   4,560   --
 Consumer price index swaps(1)  102,742   817   --    101,069   766   --
 Credit default swaps(1)  640,500   1,308   3,770    649,500   1,313   10,949
 Equity options(1)  696,776   73,659   --    510,073   90,106   --
 Synthetic guaranteed investment contracts                  
  ("GICs")(1)  1,913,202   --   --    --   --   --
 Embedded derivatives in:                  
  Modified coinsurance or funds                  
   withheld arrangements(2)  --   --   320,501    --   --   361,456
  Indexed annuity products(3)  --   4,192   751,112    --   4,945   751,523
  Variable annuity products(3)  --   --   202,693    --   --   276,718
 Total non-hedging derivatives  5,838,762   390,802   1,452,853    4,311,173   286,532   1,419,348
                       
Derivatives designated as                  
 hedging instruments:                  
 Interest rate swaps(1)  57,181   3,901   --    56,250   133   960
 Foreign currency swaps(1)  629,512   --   32,757    621,578   286   23,996
 Total hedging derivatives  686,693   3,901   32,757    677,828   419   24,956
Total derivatives$ 6,525,455 $ 394,703 $ 1,485,610  $ 4,989,001 $ 286,951 $ 1,444,304
                       
(1)Carried on the Company’s condensed consolidated balance sheets in other invested assets or other liabilities, at fair value.
(2)Embedded liability is included on the condensed consolidated balance sheets with the host contract in funds withheld at interest, at fair value.
(3)Embedded liability is included on the condensed consolidated balance sheets with the host contract in interest-sensitive contract liabilities, at fair value. Embedded asset is included on the condensed consolidated balance sheets in reinsurance ceded receivables.
Net Derivatives Gains Losses Recognized On Fair Value Derivatives And Related Hedged Items
Type of Fair Value Hedge   Hedged Item  Gains (Losses) Recognized for Derivatives  Gains (Losses) Recognized for Hedged Items  Ineffectiveness Recognized in Investment Related Gains (Losses)
             
For the three months ended September 30, 2011:       
Interest rate swaps  Fixed rate fixed maturities $ (655) $ 913 $ 258
             
For the nine months ended September 30, 2011:       
Interest rate swaps  Fixed rate fixed maturities $ (921) $ 1,509 $ 588
Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss) [Table Text Block]
 Three months ended Nine months ended
 September 30, 2012 September 30, 2012
Accumulated other comprehensive income (loss), balance beginning of period$ (719) $ (828)
Gains (losses) deferred in other comprehensive income (loss) on the effective portion of cash flow hedges   (2,831)   (2,044)
Amounts reclassified to investment related gains (losses), net  --   --
Amounts reclassified to investment income  (351)   (1,029)
Accumulated other comprehensive income (loss), balance end of period$ (3,901) $ (3,901)
Schedule of Cash Flow Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block]
Derivatives in Cash Flow Hedging Relationships Amount of Gains (Losses) Deferred in AOCI on Derivatives Amount and Location of Gains (Losses) Reclassified from AOCI into Income (Loss) Amount and Location of Gains (Losses) Recognized in Income (Loss) on Derivatives
  (Effective Portion) (Effective Portion) (Ineffective Portion and Amounts Excluded from Effectiveness Testing)
     Investment Related Gains (Losses) Investment Income Investment Related Gains (Losses) Investment Income
For the three months ended September 30, 2012:         
Interest rate swaps $ (2,831) $ -- $ 351 $ (3) $ --
                
For the nine months ended September 30, 2012:         
Interest rate swaps $ (2,044) $ -- $ 1,029 $ -- $ --
Derivatives Hedging Instruments In Net Investment Hedging Relationships
   Derivative Gains (Losses) Deferred in AOCI
   For the three months ended For the nine months ended
Type of NIFO Hedge (1) (2) 2012 2011 2012  2011
              
Foreign currency swaps $ (19,454) $ 50,974 $ (23,457) $ 25,954
              
(1)There were no sales or substantial liquidations of net investments in foreign operations that would have required the reclassification of gains or losses from accumulated other comprehensive income (loss) into investment income during the periods presented.
(2)There was no ineffectiveness recognized for the Company's hedges of net investments in foreign operations.
Changes In Estimated Fair Value Related To Embedded Derivatives
  Three months ended Nine months ended
  September 30, September 30,
  2012 2011 2012 2011
Embedded derivatives in modco or funds withheld arrangements included           
 in investment related gains$ 54,836 $ (102,574) $ 40,955 $ (1,514)
After the associated amortization of DAC and taxes, the related amounts included in net income  11,228   (22,403)   10,563   568
             
Embedded derivatives in variable annuity contracts included in investment related gains  2,579   (260,239)   74,025   (253,445)
After the associated amortization of DAC and taxes, the related amounts included in net income  1,588   (25,263)   494   (23,876)
Amounts related to embedded derivatives in equity-indexed annuities included           
 in benefits and expenses  (33,821)   14,360   (26,422)   (58,987)
After the associated amortization of DAC and taxes, the related amounts included in net income  (22,529)   23,002   6,465   (26,840)
Derivative Instruments Gain Loss By Income Statement Location
Non-hedging Derivatives         
            
A summary of the effect of non-hedging derivatives, including embedded derivatives, on the Company’s income statement for the three and nine months ended September 30, 2012 and 2011 is as follows (dollars in thousands):
            
       Gain (Loss) for the Three Months Ended
       September 30,
Type of Non-hedging Derivative Income Statement Location of Gain (Loss) 2012 2011
Interest rate swaps Investment related gains (losses), net $ (1,437) $ 142,907
Financial futures Investment related gains (losses), net   (3,977)   36,217
Foreign currency forwards Investment related gains (losses), net   519   1,374
CPI swaps Investment related gains (losses), net   422   (219)
Credit default swaps Investment related gains (losses), net   7,817   (10,018)
Equity options Investment related gains (losses), net   (23,916)   30,530
Embedded derivatives in:         
 Modified coinsurance or funds withheld        
  arrangements Investment related gains (losses), net   54,836   (102,574)
 Indexed annuity products Policy acquisition costs and other insurance      
     expenses   (224)   (3,172)
 Indexed annuity products Interest credited   (33,597)   17,531
 Variable annuity products Investment related gains (losses), net   2,579   (260,239)
Total non-hedging derivatives    $ 3,022 $ (147,663)
            
       Gain (Loss) for the Nine Months Ended
       September 30,
Type of Non-hedging Derivative Income Statement Location of Gain (Loss) 2012 2011
Interest rate swaps Investment related gains (losses), net $ 24,553 $ 157,520
Financial futures Investment related gains (losses), net   (10,312)   21,920
Foreign currency forwards Investment related gains (losses), net   (574)   1,114
CPI swaps Investment related gains (losses), net   (1,811)   1,096
Credit default swaps Investment related gains (losses), net   14,835   (8,138)
Equity options Investment related gains (losses), net   (58,532)   29,880
Embedded derivatives in:         
 Modified coinsurance or funds withheld        
  arrangements Investment related gains (losses), net   40,955   (1,514)
 Indexed annuity products Policy acquisition costs and other insurance      
     expenses   (363)   8,947
 Indexed annuity products Interest credited   (26,059)   (67,935)
 Variable annuity products Investment related gains (losses), net   74,025   (253,445)
Total non-hedging derivatives    $ 56,717 $ (110,555)
Credit Risk
   September 30, 2012 December 31, 2011  
Estimated fair value of derivatives in net asset position$ 179,206 $ 227,399  
 Securities pledged to counterparties as collateral(1)  35,093   27,052  
 Cash pledged from counterparties as collateral(2)  (178,584)   (241,480)  
 Securities pledged from counterparties as collateral(3)  (25,049)   (997)  
Net credit exposure$ 10,666 $ 11,974  
          
Margin account related to exchange-traded futures(4)$ 5,376 $ 18,153  
          
(1)Consists of U.S. Treasury securities, included in other invested assets.     
(2)Included in cash and cash equivalents, with obligation to return cash collateral recorded in other liabilities.  
(3)Consists of U.S. Treasury securities.     
(4)Included in cash and cash equivalents.