XML 89 R72.htm IDEA: XBRL DOCUMENT v2.4.0.6
Investments - Amortized Cost and Fair Value of Fixed Maturity Available-for-Sale Securities (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2012
Total fixed maturity available-for-sale securities, Amortized Cost $ 15,041,054
Total fixed maturity available-for-sale securities, Fair Value 16,088,913
Asset-backed securities [Member]
  
Other securities which provide for periodic payments, Amortized Cost 1,010,938
Other securities which provide for periodic payments, Fair Value 1,027,882
Commercial mortgage-backed securities [Member]
  
Other securities which provide for periodic payments, Amortized Cost 520,043
Other securities which provide for periodic payments, Fair Value 553,814
Structured Hybrids [Member]
  
Other securities which provide for periodic payments, Amortized Cost 135,837
Other securities which provide for periodic payments, Fair Value 135,084
Agency residential mortgage-backed securities [Member]
  
Other securities which provide for periodic payments, Amortized Cost 149,455
Other securities which provide for periodic payments, Fair Value 154,890
Non-agency residential mortgage-backed securities [Member]
  
Other securities which provide for periodic payments, Amortized Cost 629,122
Other securities which provide for periodic payments, Fair Value 660,659
Corporate [Member] | Non-structured Hybrids [Member] | U.S. Government Securities [Member] | Municipal [Member]
  
Due in one year or less, Amortized Cost 700,491
Due after one year through five years, Amortized Cost 3,230,602
Due after five years through ten years, Amortized Cost 3,692,333
Due after ten years, Amortized Cost 4,972,233
Subtotal, Amortized Cost 12,595,659
Due in one year or less, Fair Value 703,931
Due after one year through five years, Fair Value 3,324,453
Due after five years through ten years, Fair Value 3,995,811
Due after ten years, Fair Value 5,532,389
Subtotal, Fair Value $ 13,556,584