XML 82 R162.htm IDEA: XBRL DOCUMENT v2.4.0.6
Schedule I - Summary of Investments - Other than Investments in Related Parties (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2012
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]  
Amortized Cost $ 15,619,544 [1]
Fair Value 16,736,535
Amount at which shown in the balance sheet 16,736,535
Fixed maturities [Member]
  
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]  
Amortized Cost 15,041,054 [1]
Fair Value 16,088,913
Amount at which shown in the balance sheet 16,088,913
Fixed maturities [Member] | Bonds [Member] | United States Government and government agencies and authorities [Member]
  
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]  
Amortized Cost 1,435,556 [1]
Fair Value 1,466,488
Amount at which shown in the balance sheet 1,466,488
Fixed maturities [Member] | Bonds [Member] | States, municipalities and political subdivisions [Member]
  
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]  
Amortized Cost 1,083,774 [1]
Fair Value 1,224,554
Amount at which shown in the balance sheet 1,224,554
Fixed maturities [Member] | Bonds [Member] | Foreign governments [Member]
  
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]  
Amortized Cost 672 [1]
Fair Value 815
Amount at which shown in the balance sheet 815
Fixed maturities [Member] | Bonds [Member] | Public utilities [Member]
  
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]  
Amortized Cost 2,166,720 [1]
Fair Value 2,400,804
Amount at which shown in the balance sheet 2,400,804
Fixed maturities [Member] | Bonds [Member] | All other corporate bonds [Member]
  
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]  
Amortized Cost 10,354,332 [1]
Fair Value 10,996,252
Amount at which shown in the balance sheet 10,996,252
Equity securities [Member]
  
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]  
Amortized Cost 237,499 [1]
Fair Value 248,087
Amount at which shown in the balance sheet 248,087
Equity securities [Member] | Common stocks [Member] | Banks, trust, and insurance companies [Member]
  
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]  
Amortized Cost 67,452 [1]
Fair Value 68,692
Amount at which shown in the balance sheet 68,692
Equity securities [Member] | Nonredeemable preferred stock [Member]
  
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]  
Amortized Cost 170,047 [1]
Fair Value 179,395
Amount at which shown in the balance sheet 179,395
Derivative investments [Member]
  
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]  
Amortized Cost 142,123 [1]
Fair Value 200,667
Amount at which shown in the balance sheet 200,667
Asset-backed loans [Member]
  
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]  
Amortized Cost 180,054 [1]
Fair Value 180,054
Amount at which shown in the balance sheet 180,054
Policy loans [Member]
  
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]  
Amortized Cost 11,758 [1]
Fair Value 11,758
Amount at which shown in the balance sheet 11,758
Other long-term investments [Member]
  
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]  
Amortized Cost 7,056 [1]
Fair Value 7,056
Amount at which shown in the balance sheet $ 7,056
[1] Represents (i) original cost reduced by repayments and other-than-temporary impairments and adjusted for amortization of premiums and accrual of discounts for fixed maturity securities, (ii) original cost reduced by other-than-temporary impairments for equity securities, (iii) original cost for derivative investments, and (iv) unpaid principal balance reduced by an allowance for credit losses for asset-backed loans.