XML 93 R29.htm IDEA: XBRL DOCUMENT v2.4.0.8
Investments Fixed Maturity Securities by Contractual Maturity (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2013
Dec. 31, 2012
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis [Abstract]    
Available-for-sale Securities, Debt Maturities, within One Year, Amortized Cost Basis $ 113,074  
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Amortized Cost Basis 840,609  
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Amortized Cost Basis 6,802,325  
Available-for-sale Securities, Debt Maturities, after Ten Years through Twenty Years, Amortized Cost Basis 5,829,419  
Available-for-sale Securities, Debt Maturities, after Twenty Years, Amortized Cost 6,574,671  
Available-for-sale Securities, Debt Maturities, Single Maturity Date, Amortized Cost 20,160,098  
Available-for-sale Debt Securities, Amortized Cost Basis 24,789,087  
Available-for-sale Securities, Debt Maturities, Fair Value [Abstract]    
Available-for-sale Securities, Debt Maturities, within One Year, Fair Value 116,889  
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Fair Value 941,104  
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Fair Value 6,819,438  
Available-for-sale Securities, Debt Maturities, after Ten Years Through Twenty Years, Fair Value 6,033,288  
Available-for-sale Securities, Debt Maturities, after Twenty Years, Fair Value 6,929,362  
Available-for-sale Securities, Debt Maturities, Single Maturity Date, Fair Value 20,840,081  
Available-for-sale Securities, Debt Securities 25,545,642 24,172,136
Held-to-maturity Securities, Debt Maturities, Net Carrying Amount [Abstract]    
Held-to-maturity Securities, Debt Maturities, within One Year, Net Carrying Amount 0  
Held-to-maturity Securities, Debt Maturities, after One Through Five Years, Net Carrying Amount 0  
Held-to-maturity Securities, Debt Maturities, after Five Through Ten Years, Net Carrying Amount 0  
Held-to-maturity Securities, Debt Maturities, after Ten Years Through Twenty Years, Net Carrying Amount 0  
Held-to-maturity Securities, Debt Maturities, after Twenty Years, Net Carrying Amount 76,170  
Held-to-maturity Securities, Debt Maturities, Single Maturity Date, Net Carrying Amount 76,170  
Held-to-maturity Securities, Debt Maturities, Net Carrying Amount 76,170  
Held-to-maturity Securities, Debt Maturities, Fair Value [Abstract]    
Held-to-maturity Securities, Debt Maturities, within One Year, Fair Value 0  
Held-to-maturity Securities, Debt Maturities, after One Through Five Years, Fair Value 0  
Held-to-maturity Securities, Debt Maturities, after Five Through Ten Years, Fair Value 0  
Held-to-maturity Securities, Debt Maturities, after Ten Years Through Twenty Years, Fair Value 0  
Held-to-maturity Securities, Debt Maturities, after Twenty Years, Fair Value 61,250  
Held-to-maturity Securities, Debt Maturities, Single Maturity Date, Fair Value 61,250  
Held-to-maturity Securities, Debt Maturities, Fair Value 61,250  
Residential Mortgage Backed Securities [Member]
   
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis [Abstract]    
Available-for-sale Securities, without Single Maturity Date, Amortized Cost 2,337,399  
Available-for-sale Securities, Debt Maturities, Fair Value [Abstract]    
Available-for-sale Securities, without Single Maturity Date, Fair Value 2,488,057  
Held-to-maturity Securities, Debt Maturities, Net Carrying Amount [Abstract]    
Held-to-maturity Securities, Debt Maturities, without Single Maturity Date, Net Carrying Amount 0  
Held-to-maturity Securities, Debt Maturities, Fair Value [Abstract]    
Held-to-maturity Securities, Debt Maturities, without Single Maturity Date, Fair Value 0  
Commercial Mortgage Backed Securities [Member]
   
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis [Abstract]    
Available-for-sale Securities, without Single Maturity Date, Amortized Cost 1,304,028  
Available-for-sale Securities, Debt Maturities, Fair Value [Abstract]    
Available-for-sale Securities, without Single Maturity Date, Fair Value 1,222,689  
Held-to-maturity Securities, Debt Maturities, Net Carrying Amount [Abstract]    
Held-to-maturity Securities, Debt Maturities, without Single Maturity Date, Net Carrying Amount 0  
Held-to-maturity Securities, Debt Maturities, Fair Value [Abstract]    
Held-to-maturity Securities, Debt Maturities, without Single Maturity Date, Fair Value 0  
Asset-backed Securities [Member]
   
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis [Abstract]    
Available-for-sale Securities, without Single Maturity Date, Amortized Cost 987,562  
Available-for-sale Securities, Debt Maturities, Fair Value [Abstract]    
Available-for-sale Securities, without Single Maturity Date, Fair Value 994,815  
Held-to-maturity Securities, Debt Maturities, Net Carrying Amount [Abstract]    
Held-to-maturity Securities, Debt Maturities, without Single Maturity Date, Net Carrying Amount 0  
Held-to-maturity Securities, Debt Maturities, Fair Value [Abstract]    
Held-to-maturity Securities, Debt Maturities, without Single Maturity Date, Fair Value $ 0