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Income Taxes (Tables)
12 Months Ended
Dec. 31, 2012
IncomeTaxDisclosureAbstract  
ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock
  2012 2011 2010
      (in thousands)   
Current tax expense:         
U.S. $ 26,637 $ 32,230 $ (27,926)
State and local   -   -   (693)
Total $ 26,637 $ 32,230 $ (28,619)
          
Deferred tax expense:         
U.S.   196,997   (198,293)   148,362
State and local   -   -   (237)
Total $ 196,997 $ (198,293) $ 148,125
          
Total income tax (benefit) expense on income from continuing operations    223,634   (166,063)   119,506
Income tax expense (benefit) reported in equity related to:         
Other comprehensive income (loss)   (7,218)   (16,240)   25,591
Additional paid-in capital   5,730   -   -
Total income tax (benefit) expense $ 222,146 $ (182,303) $ 145,097
ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock
   2012  2011  2010
      (in thousands)   
Expected federal income tax (benefit) expense $ 300,192 $ (111,165) $ 186,653
Non taxable investment income   (66,895)   (47,451)   (55,497)
Tax credits   (10,279)   (7,517)   (11,290)
State income taxes, net of federal benefit   -   -   (604)
Other   616   70   244
Total income tax (benefit) expense $ 223,634 $ (166,063) $ 119,506
ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock
   2012  2011
   (in thousands)
Deferred tax assets      
Insurance reserves $ 398,481 $ 470,084
Investments   86,745   88,757
Compensation reserves   3,223   4,546
Other   1,547   1,697
Deferred tax assets   489,996   565,084
       
Deferred tax liabilities      
VOBA and deferred policy acquisition cost   269,507   166,754
Deferred annuity bonus   194,890   156,044
Net unrealized gain on securities   133,136   154,314
Deferred tax liabilities   597,533   477,112
Net deferred tax asset (liability) $ (107,537) $ 87,971