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Fair Value Disclosures (Tables)
 9 Months Ended
Sep. 30, 2012
Fair Value Of Financial Instruments [Abstract]  
Schedule Of Fair Value Assets And Liabilities Measured On Recurring Basis Table Text Block
September 30, 2012:    Fair Value Measurements Using:
  Total  Level 1  Level 2  Level 3
Assets:           
 Fixed maturity securities – available-for-sale:           
  Corporate securities$ 11,899,722 $ 52,993 $ 10,339,456 $ 1,507,273
  Canadian and Canadian provincial governments  4,091,883   --   4,091,883   --
  Residential mortgage-backed securities  1,055,808   --   1,006,449   49,359
  Asset-backed securities  572,700   --   383,110   189,590
  Commercial mortgage-backed securities  1,740,391   --   1,573,323   167,068
  U.S. government and agencies securities  284,857   212,636   67,655   4,566
  State and political subdivision securities  287,417   --   240,467   46,950
  Other foreign government supranational and foreign           
   government-sponsored enterprises  1,725,636   228,478   1,497,158   --
    Total fixed maturity securities – available-for-sale  21,658,414   494,107   19,199,501   1,964,806
 Funds withheld at interest – embedded derivatives  (320,501)   --   --   (320,501)
 Cash equivalents  1,025,410   1,025,410   --   --
 Short-term investments  44,556   --   22,495   22,061
 Other invested assets:           
  Non-redeemable preferred stock  74,680   63,874   10,806   --
  Other equity securities  134,592   134,592   --   --
  Derivatives:           
   Interest rate swaps  136,211   --   136,211   --
   Foreign currency forwards  4,016   --   4,016   --
   CPI swaps  817   --   817   --
   Credit default swaps  (2,381)   --   (2,381)   --
   Equity options  73,659   --   73,659   --
  Collateral  37,202   34,598   2,604   --
  Other  37,056   37,056   --   --
    Total other invested assets  495,852   270,120   225,732   --
 Reinsurance ceded receivable – embedded derivatives  4,192   --   --   4,192
  Total$ 22,907,923 $ 1,789,637 $ 19,447,728 $ 1,670,558
                
Liabilities:           
 Interest sensitive contract liabilities – embedded derivatives $ 953,804 $ -- $ -- $ 953,804
 Other liabilities:           
  Derivatives:           
   Interest rate swaps  277   --   277   --
   Credit default swaps  81   --   81   --
   Foreign currency swaps  32,757   --   32,757   --
    Total other liabilities  33,115   --   33,115   --
  Total$ 986,919 $ -- $ 33,115 $ 953,804

December 31, 2011:    Fair Value Measurements Using:
  Total  Level 1  Level 2  Level 3
Assets:           
 Fixed maturity securities – available-for-sale:           
  Corporate securities$ 7,461,106 $ 76,097 $ 6,410,840 $ 974,169
  Canadian and Canadian provincial governments  3,869,933   --   3,869,933   --
  Residential mortgage-backed securities  1,227,234   --   1,145,579   81,655
  Asset-backed securities  401,991   --   208,499   193,492
  Commercial mortgage-backed securities  1,242,219   --   1,126,243   115,976
  U.S. government and agencies securities  374,002   300,514   73,488   --
  State and political subdivision securities  205,386   12,894   182,119   10,373
  Other foreign government, supranational and foreign           
   government-sponsored enterprises  1,419,079   223,440   1,195,639   --
    Total fixed maturity securities – available-for-sale  16,200,950   612,945   14,212,340   1,375,665
 Funds withheld at interest – embedded derivatives  (361,456)   --   --   (361,456)
 Cash equivalents  504,522   504,522   --   --
 Short-term investments  46,671   37,155   9,516   --
 Other invested assets:           
  Non-redeemable preferred stock  78,183   58,906   19,277   --
  Other equity securities  35,717   5,308   18,920   11,489
  Derivatives:           
   Interest rate swaps  168,484   --   168,484   --
   Foreign currency forwards  4,560   --   4,560   --
   CPI swaps  766   --   766   --
   Credit default swaps  (4,003)   --   (4,003)   --
   Equity options  87,243   --   87,243   --
  Collateral  32,622   27,052   5,570   --
  Other   59,373   59,373   --   --
    Total other invested assets  462,945   150,639   300,817   11,489
 Reinsurance ceded receivable – embedded derivatives  4,945   --   --   4,945
  Total$ 16,858,577 $ 1,305,261 $ 14,522,673 $ 1,030,643
                
Liabilities:           
 Interest sensitive contract liabilities – embedded derivatives $ 1,028,241 $ -- $ -- $ 1,028,241
 Other liabilities:           
  Derivatives:           
   Interest rate swaps  3,171   --   3,171   --
   Credit default swaps  5,633   --   5,633   --
   Equity options  (2,864)   --   (2,864)   --
   Foreign currency swaps  23,710   --   23,710   --
    Total other liabilities  29,650   --   29,650   --
  Total$ 1,057,891 $ -- $ 29,650 $ 1,028,241
Fair Value Unobservable Input Measurements [Table Text Block]
September 30, 2012:   Valuation Unobservable  Range
    Fair Value Technique(s) Input (Weighted Average)
Assets:         
 State and political subdivision securities $ 15,186 Market comparable securities Liquidity premium 1%
            
 Corporate securities   431,187 Market comparable securities Liquidity premium 0-2% (1%)
            
 Short-term investments   22,061 Market comparable securities Liquidity premium 1%
            
 Funds withheld at interest- embedded derivatives   (320,501) Total return swap Mortality 0-100% (1%)
         Lapse 0-35% (6%)
         Withdrawal 0-5% (3%)
         Own Credit 0-1% (1%)
         Crediting rate 2-4% (3%)
            
 Reinsurance ceded receivable- embedded derivatives   4,192 Discounted cash flow Mortality 0-100% (8%)
         Lapse 14-16% (15%)
            
            
            
            
            
September 30, 2012 (continued):   Valuation Unobservable  Range
    Fair Value Technique(s) Input (Weighted Average)
Liabilities:         
 Interest sensitive contract liabilities- embedded derivatives- indexed annuities   751,112 Discounted cash flow Mortality 0-100% (1%)
         Lapse 0-35% (6%)
         Withdrawal 0-5% (3%)
         Option budget projection 2-4% (3%)
            
            
 Interest sensitive contract liabilities- embedded derivatives- variable annuities   202,692 Discounted cash flow Mortality 0-100% (2%)
         Lapse 0-25% (5%)
         Withdrawal 0-7% (3%)
         Own Credit 0-1% (1%)
         Long-term volatility 0-27% (16%)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Level Transfers [Table Text Block]
     Three months ended September 30,
     2012 2011
     Transfers from  Transfers from  Transfers from  Transfers from
     Level 1 to  Level 2 to  Level 1 to  Level 2 to
     Level 2 Level 1 Level 2 Level 1
 Fixed maturity securities - available-for-sale:           
  Corporate securities$ 11,777 $ -- $ -- $ --
  State and political subdivision securities  --   --   --   5,485
  Other foreign government, supranational and foreign            
   government-sponsored enterprises  2,163   --   1,474   --
 Total fixed maturity securities  13,940   --   1,474   5,485
  Non-redeemable preferred stock  9,646   11,068   --   --
 Total $ 23,586 $ 11,068 $ 1,474 $ 5,485

     Nine months ended September 30,
     2012 2011
     Transfers from Transfers from Transfers from Transfers from
     Level 1 to Level 2 to Level 1 to Level 2 to
     Level 2 Level 1 Level 2 Level 1
 Fixed maturity securities - available-for-sale:           
  Corporate securities$ 14,773 $ 4 $ -- $ --
  U.S. government and agencies securities  --   11,152   23,065   --
  State and political subdivision securities  12,794   --   --   5,485
  Other foreign government, supranational and foreign            
   government-sponsored enterprises  3,222   --   1,845   --
 Total fixed maturity securities  30,789   11,156   24,910   5,485
  Non-redeemable preferred stock  9,646   11,068   --   --
  Other equity securities  --   --   2,290   --
 Total$ 40,435 $ 22,224 $ 27,200 $ 5,485
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Text Block]
For the three months ended September 30, 2012:Fixed maturity securities - available-for-sale
        Residential      Commercial
        mortgage-     mortgage-
    Corporate   backed   Asset-backed  backed
    securities  securities  securities  securities
Fair value, beginning of period$ 994,014 $ 49,591 $ 128,358 $ 115,733
 Total gains/losses (realized/unrealized)           
  Included in earnings, net:           
   Investment income, net of related expenses  (4,846)   114   54   446
   Investment related gains (losses), net  (1,059)   (187)   (3)   (2,088)
   Claims & other policy benefits  --   --   --   --
   Interest credited  --   --   --   --
   Policy acquisition costs and other insurance expenses  --   --   --   --
  Included in other comprehensive income  22,280   479   7,658   6,188
 Purchases(1)  556,031   31,020   62,109   21,092
 Sales(1)  (18,548)   (24,566)   (3,725)   --
 Settlements(1)  (31,448)   (1,437)   (4,407)   (511)
 Transfers into Level 3  1,293   1,804   5,006   26,208
 Transfers out of Level 3  (10,444)   (7,459)   (5,460)   --
Fair value, end of period$ 1,507,273 $ 49,359 $ 189,590 $ 167,068
               
Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period           
  Included in earnings, net:           
   Investment income, net of related expenses$ (4,861) $ 28 $ 40 $ 446
   Investment related gains (losses), net  (223)   --   (242)   (2,088)
   Claims & other policy benefits  --   --   --   --
   Interest credited  --   --   --   --
   Policy acquisition costs and other insurance expenses  --   --   --   --

For the three months ended September 30, 2012 (continued):Fixed maturity securities - available-for-sale      
    U.S. State Funds withheld   
    Government  and political at interest-  
    and agencies subdivision embedded  Short-term
    securities securities derivatives investments
Fair value, beginning of period$ -- $ 14,486 $ (375,337) $ --
 Total gains/losses (realized/unrealized)           
  Included in earnings, net:           
   Investment income, net of related expenses  (59)   1   --   (7)
   Investment related gains (losses), net  --   (4)   54,836   --
   Claims & other policy benefits  --   --   --   --
   Interest credited  --   --   --   --
   Policy acquisition costs and other insurance expenses  --   --   --   --
  Included in other comprehensive income  (15)   3,433   --   54
 Purchases(1)  4,640   --   --   22,014
 Sales(1)  --   --   --   --
 Settlements(1)  --   (116)   --   --
 Transfers into Level 3  --   29,150   --   --
 Transfers out of Level 3  --   --   --   --
Fair value, end of period$ 4,566 $ 46,950 $ (320,501) $ 22,061
               
Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period           
  Included in earnings, net:           
   Investment income, net of related expenses$ (59) $ 1 $ -- $ (7)
   Investment related gains (losses), net  --   --   54,836   --
   Claims & other policy benefits  --   --   --   --
   Interest credited  --   --   --   --
   Policy acquisition costs and other insurance expenses  --   --   --   --

For the three months ended September 30, 2012 (continued):   Reinsurance  Interest sensitive      
     Other invested ceded receivable-  contract liabilities      
     assets- other embedded embedded      
     equity securities derivatives derivatives      
Fair value, beginning of period $ 3,227 $ 4,416 $ (938,927)      
 Total gains/losses (realized/unrealized)               
  Included in earnings, net:               
   Investment income, net of related expenses   --   --   --      
   Investment related gains (losses), net   --   --   2,579      
   Claims & other policy benefits   --   --   213      
   Interest credited   --   --   (33,980)      
   Policy acquisition costs and other insurance expenses   --   (124)   --      
  Included in other comprehensive income   --   --   --      
 Purchases(1)   --   --   (8,502)      
 Sales(1)   --   --   --      
 Settlements(1)   --   (100)   24,813      
 Transfers into Level 3   --   --   --      
 Transfers out of Level 3   (3,227)   --   --      
Fair value, end of period $ -- $ 4,192 $ (953,804)      
                   
Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period               
  Included in earnings, net:               
   Investment income, net of related expenses $ -- $ -- $ --      
   Investment related gains (losses), net   --   --   427      
   Claims & other policy benefits   --   --   (23)      
   Interest credited   --   --   (58,621)      
   Policy acquisition costs and other insurance expenses   --   13   --      
                   
(1)The amount reported within purchases, sales and settlements is the purchase price (for purchases) and the sales/settlement proceeds (for sales and settlements) based upon the actual date purchased or sold/settled. Items purchased and sold/settled in the same period are excluded from the rollforward. The Company had no issuances during the period.

For the nine months ended September 30, 2012:Fixed maturity securities - available-for-sale   
        Residential      Commercial    
        mortgage-     mortgage-   
    Corporate   backed   Asset-backed  backed   
    securities  securities  securities  securities   
Fair value, beginning of period$ 974,169 $ 81,655 $ 193,492 $ 115,976   
 Total gains/losses (realized/unrealized)              
  Included in earnings, net:              
   Investment income, net of related expenses  (4,738)   413   497   1,579   
   Investment related gains (losses), net  (2,339)   (223)   (510)   (13,771)   
   Claims & other policy benefits  --   --   --   --   
   Interest credited  --   --   --   --   
   Policy acquisition costs and other insurance expenses  --   --   --   --   
  Included in other comprehensive income  31,940   1,886   16,135   17,436   
 Purchases(1)  645,466   31,602   64,121   21,092   
 Sales(1)  (45,833)   (40,790)   (11,627)   (1,552)   
 Settlements(1)  (84,819)   (5,139)   (11,510)   (568)   
 Transfers into Level 3  18,738   8,979   6,086   37,054   
 Transfers out of Level 3  (25,311)   (29,024)   (67,094)   (10,178)   
Fair value, end of period$ 1,507,273 $ 49,359 $ 189,590 $ 167,068   
                  
Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period              
  Included in earnings, net:              
   Investment income, net of related expenses$ (4,747) $ 283 $ 440 $ 1,579   
   Investment related gains (losses), net  (1,329)   (269)   (849)   (14,163)   
   Claims & other policy benefits  --   --   --   --   
   Interest credited  --   --   --   --   
   Policy acquisition costs and other insurance expenses  --   --   --   --   

For the nine months ended September 30, 2012 (continued):Fixed maturity securities - available-for-sale         
    U.S. State Funds withheld      
    Government and political  at interest -      
    and agencies subdivision embedded Short-term    
    securities securities derivatives investments   
Fair value, beginning of period$ -- $ 10,373 $ (361,456) $ --   
 Total gains/losses (realized/unrealized)              
  Included in earnings, net:              
   Investment income, net of related expenses  (59)   5   --   (7)   
   Investment related gains (losses), net  --   (12)   40,955   --   
   Claims & other policy benefits  --   --   --   --   
   Interest credited  --   --   --   --   
   Policy acquisition costs and other insurance expenses  --   --   --   --   
  Included in other comprehensive income  (15)   4,666   --   54   
 Purchases(1)  4,640   --   --   22,014   
 Sales(1)  --   --   --   --   
 Settlements(1)  --   (162)   --   --   
 Transfers into Level 3  --   37,588   --   --   
 Transfers out of Level 3  --   (5,508)   --   --   
Fair value, end of period$ 4,566 $ 46,950 $ (320,501) $ 22,061   
                  
Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period              
  Included in earnings, net:              
   Investment income, net of related expenses$ (59) $ 5 $ -- $ (7)   
   Investment related gains (losses), net  --   --   40,955   --   
   Claims & other policy benefits  --   --   --   --   
   Interest credited  --   --   --   --   
   Policy acquisition costs and other insurance expenses  --   --   --   --   

For the nine months ended September 30, 2012 (continued):   Reinsurance  Interest sensitive      
    Other invested ceded receivable-  contract liabilities      
    assets- other embedded embedded      
    equity securities derivatives derivatives      
Fair value, beginning of period$ 11,489 $ 4,945 $ (1,028,241)      
 Total gains/losses (realized/unrealized)              
  Included in earnings, net:              
   Investment income, net of related expenses  --   --   --      
   Investment related gains (losses), net  1,098   --   74,025      
   Claims & other policy benefits  --   --   770      
   Interest credited  --   --   (27,348)      
   Policy acquisition costs and other insurance expenses  --   (449)   --      
  Included in other comprehensive income  843   --   --      
 Purchases(1)  108   --   (48,199)      
 Sales(1)  (3,788)   --   --      
 Settlements(1)  --   (304)   75,189      
 Transfers into Level 3  --   --   --      
 Transfers out of Level 3  (9,750)   --   --      
Fair value, end of period$ -- $ 4,192 $ (953,804)      
                  
Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period              
  Included in earnings, net:              
   Investment income, net of related expenses$ -- $ -- $ --      
   Investment related gains (losses), net  (183)   --   68,315      
   Claims & other policy benefits  --   --   56      
   Interest credited  --   --   (102,017)      
   Policy acquisition costs and other insurance expenses  --   (33)   --      
                  
(1)The amount reported within purchases, sales and settlements is the purchase price (for purchases) and the sales/settlement proceeds (for sales and settlements) based upon the actual date purchased or sold/settled. Items purchased and sold/settled in the same period are excluded from the rollforward. The Company had no issuances during the period.

For the three months ended September 30, 2011:Fixed maturity securities - available-for-sale
        Residential      Commercial
        mortgage-     mortgage-
    Corporate   backed   Asset-backed  backed
    securities  securities  securities  securities
Fair value, beginning of period$ 977,560 $ 103,430 $ 188,773 $ 150,765
 Total gains/losses (realized/unrealized)           
  Included in earnings, net:           
   Investment income, net of related expenses  38   181   271   505
   Investment related gains (losses), net  591   (1,059)   (6,760)   (6,548)
   Claims & other policy benefits  --   --   --   --
   Interest credited  --   --   --   --
   Policy acquisition costs and other insurance expenses  --   --   --   --
  Included in other comprehensive income  7,725   44   (1,827)   (14,717)
 Purchases (1)  59,905   454   7,449   --
 Sales(1)  (14,415)   --   (5,547)   --
 Settlements(1)  (23,677)   (1,447)   (3,172)   --
 Transfers into Level 3  15,947   2,248   10,773   --
 Transfers out of Level 3  (65,855)   (36,941)   (27,417)   (17,026)
Fair value, end of period$ 957,819 $ 66,910 $ 162,543 $ 112,979
               
Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period           
  Included in earnings, net:           
   Investment income, net of related expenses$ 32 $ 181 $ 246 $ 504
   Investment related gains (losses), net  (708)   (131)   (1,052)   (6,548)
   Claims & other policy benefits  --   --   --   --
   Interest credited  --   --   --   --
   Policy acquisition costs and other insurance expenses  --   --   --   --

For the three months ended September 30, 2011 (continued):Fixed maturity securities -    
    available-for-sale   
      Other foreign  
    State government, Funds withheld
    and political  supranational and  at interest-
    subdivision foreign government- embedded
    securities sponsored enterprises derivatives
Fair value, beginning of period$ 22,932 $ 4,074 $ (173,160)
 Total gains/losses (realized/unrealized)        
  Included in earnings, net:        
   Investment income, net of related expenses  (5)   --   --
   Investment related gains (losses), net  (4)   --   (102,574)
   Claims & other policy benefits  --   --   --
   Interest credited  --   --   --
   Policy acquisition costs and other insurance expenses  --   --   --
  Included in other comprehensive income  225   --   --
 Purchases(1)  --   --   --
 Sales(1)  --   --   --
 Settlements(1)  (22)   --   --
 Transfers out of Level 3  (13,736)   (4,074)   --
Fair value, end of period$ 9,390 $ -- $ (275,734)
            
Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period        
  Included in earnings, net:        
   Investment income, net of related expenses$ (5) $ -- $ --
   Investment related gains (losses), net  --   --   (102,575)
   Claims & other policy benefits  --   --   --
   Interest credited  --   --   --
   Policy acquisition costs and other insurance expenses  --   --   --

For the three months ended September 30, 2011 (continued):  Reinsurance  Interest sensitive
    Other invested ceded receivable-  contract liabilities
    assets- other embedded embedded
    equity securities derivatives derivatives
Fair value, beginning of period$ 11,001 $ 86,029 $ (804,171)
 Total gains/losses (realized/unrealized)        
  Included in earnings, net:        
   Investment income, net of related expenses  --   --   --
   Investment related gains (losses), net  --   --   (260,239)
   Claims & other policy benefits  --   --   (1,600)
   Interest credited  --   --   19,598
   Policy acquisition costs and other insurance expenses  --   (3,443)   --
  Included in other comprehensive income  195   --   --
 Purchases(1)  --   2,081   (16,063)
 Sales(1)  (633)   --   --
 Settlements(1)  --   (3,123)   20,862
 Transfers into Level 3  --   --   --
 Transfers out of Level 3  --   --   --
Fair value, end of period$ 10,563 $ 81,544 $ (1,041,613)
            
Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period        
  Included in earnings, net:        
   Investment income, net of related expenses$ -- $ -- $ --
   Investment related gains (losses), net  --   --   (262,552)
   Claims & other policy benefits  --   --   (1,135)
   Interest credited  --   --   (1,265)
   Policy acquisition costs and other insurance expenses  --   (592)   --
            
(1)The amount reported within purchases, sales and settlements is the purchase price (for purchases) and the sales/settlement proceeds (for sales and settlements) based upon the actual date purchased or sold/settled. Items purchased and sold/settled in the same period are excluded from the rollforward. The Company had no issuances during the period.
           
           

For the nine months ended September 30, 2011:Fixed maturity securities - available-for-sale
        Residential      Commercial
        mortgage-     mortgage-
    Corporate   backed   Asset-backed  backed
    securities  securities  securities  securities
Fair value, beginning of period$ 872,179 $ 183,291 $ 228,558 $ 147,556
 Total gains/losses (realized/unrealized)           
  Included in earnings, net:           
   Investment income, net of related expenses  200   674   1,175   1,673
   Investment related gains (losses), net  1,332   (1,460)   (9,588)   (9,280)
   Claims & other policy benefits  --   --   --   --
   Interest credited  --   --   --   --
   Policy acquisition costs and other insurance expenses  --   --   --   --
  Included in other comprehensive income  17,174   4,528   5,586   12,599
 Purchases(1)  257,713   6,236   37,328   7,684
 Sales(1)  (35,487)   (20,701)   (27,844)   --
 Settlements(1)  (99,407)   (13,812)   (20,013)   (3,410)
 Transfers into Level 3  76,627   7,250   32,274   66,854
 Transfers out of Level 3  (132,512)   (99,096)   (84,933)   (110,697)
Fair value, end of period$ 957,819 $ 66,910 $ 162,543 $ 112,979
               
Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period           
  Included in earnings, net:           
   Investment income, net of related expenses$ 162 $ 655 $ 1,084 $ 1,660
   Investment related gains (losses), net  (1,223)   (175)   (4,603)   (9,292)
   Claims & other policy benefits  --   --   --   --
   Interest credited  --   --   --   --
   Policy acquisition costs and other insurance expenses  --   --   --   --

For the nine months ended September 30, 2011 (continued):Fixed maturity securities -       
    available-for-sale      
       Other foreign      
    State government, Funds withheld   
    and political  supranational and  at interest-   
    subdivision foreign government- embedded  
    securities sponsored enterprises derivatives  
Fair value, beginning of period$ 6,983 $ 6,736 $ (274,220)   
 Total gains/losses (realized/unrealized)           
  Included in earnings, net:           
   Investment income, net of related expenses  365   1   --   
   Investment related gains (losses), net  (11)   --   (1,514)   
   Claims & other policy benefits  --   --   --   
   Interest credited  --   --   --   
   Policy acquisition costs and other insurance expenses  --   --   --   
  Included in other comprehensive income  3,839   8   --   
 Purchases(1)  871   --   --   
 Sales(1)  --   (161)   --   
 Settlements(1)  (65)   --   --   
 Transfers into Level 3  48,469   21   --   
 Transfers out of Level 3  (51,061)   (6,605)   --   
Fair value, end of period$ 9,390 $ -- $ (275,734)   
               
Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period           
  Included in earnings, net:           
   Investment income, net of related expenses$ 365 $ (36) $ --   
   Investment related gains (losses), net  --   --   (1,514)   
   Claims & other policy benefits  --   --   --   
   Interest credited  --   --   --   
   Policy acquisition costs and other insurance expenses  --   --   --   

For the nine months ended September 30, 2011 (continued):Other invested   Reinsurance  Interest sensitive
    assets- non- Other invested ceded receivable-  contract liabilities
    redeemable assets- other embedded embedded
    preferred stock equity securities derivatives derivatives
Fair value, beginning of period$ 420 $ 16,416 $ 75,431 $ (721,485)
 Total gains/losses (realized/unrealized)           
  Included in earnings, net:           
   Investment income, net of related expenses  --   --   --   --
   Investment related gains (losses), net  --   3,504   --   (253,445)
   Claims & other policy benefits  --   --   --   (1,283)
   Interest credited  --   --   --   (66,519)
   Policy acquisition costs and other insurance expenses  --   --   8,869   --
  Included in other comprehensive income  --   (4,792)   --   --
 Purchases(1)  --   --   6,345   (57,283)
 Sales(1)  (420)   (4,565)   --   --
 Settlements(1)  --   --   (9,101)   58,402
 Transfers into Level 3  --   --   --   --
 Transfers out of Level 3  --   --   --   --
Fair value, end of period$ -- $ 10,563 $ 81,544 $ (1,041,613)
               
Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period           
  Included in earnings, net:           
   Investment income, net of related expenses$ -- $ -- $ -- $ --
   Investment related gains (losses), net  --   --   --   (255,758)
   Claims & other policy benefits  --   --   --   (1,151)
   Interest credited  --   --   --   (124,920)
   Policy acquisition costs and other insurance expenses  --   --   17,892   --
               
(1)The amount reported within purchases, sales and settlements is the purchase price (for purchases) and the sales/settlement proceeds (for sales and settlements) based upon the actual date purchased or sold/settled. Items purchased and sold/settled in the same period are excluded from the rollforward. The Company had no issuances during the period.
              
              
Financial Instruments Carrying Amounts And Estimated Fair Value [Text Block]
September 30, 2012    Estimated Fair Fair Value Measurement Using:
    Carrying Value  Value  Level 1 Level 2 Level 3
Assets:              
 Mortgage loans on real estate$ 2,256,881 $ 2,383,088 $ -- $ -- $ 2,383,088
 Policy loans  1,243,498   1,243,498   --   1,243,498   --
 Funds withheld at interest(1)  5,929,140   6,399,803   --   --   6,399,803
 Cash and cash equivalents(2)  578,320   578,320   578,320   --   --
 Short-term investments(2)  46,233   46,233   46,233   --   --
 Other invested assets(2)  604,495   629,905   --   18,900   611,005
 Accrued investment income  250,048   250,048   --   250,048   --
Liabilities:              
 Interest-sensitive contract liabilities(1)$ 11,404,136 $ 11,597,198 $ -- $ -- $ 11,597,198
 Long-term debt  1,815,111   1,958,231   --   --   1,958,231
 Collateral finance facility  651,968   443,020   --   --   443,020

December 31, 2011:    Estimated Fair         
    Carrying Value Value         
Assets:              
 Mortgage loans on real estate$ 991,731 $ 1,081,924         
 Policy loans  1,260,400   1,260,400         
 Funds withheld at interest(1)  5,771,880   6,041,984         
 Cash and cash equivalents(2)  458,348   458,348         
 Short-term investments(2)  41,895   41,895         
 Other invested assets(2)  500,681   503,293         
 Accrued investment income  144,334   144,334         
Liabilities:              
 Interest-sensitive contract liabilities(1)$ 6,203,001 $ 6,307,779         
 Long-term debt  1,414,688   1,462,329         
 Collateral finance facility  652,032   390,900         
                 
(1)Carrying values presented herein differ from those presented in the condensed consolidated balance sheets because certain items within the respective financial statement caption are embedded derivatives and are measured at fair value on a recurring basis.
                
(2)Carrying values presented herein differ from those presented in the condensed consolidated balance sheets because certain items within the respective financial statement caption are measured at fair value on a recurring basis.