Policyholders Liabilities (Policyholders Account Balances) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Policyholders' account balances, funding agreement $ 14,303,330 $ 8,557,077
Interest Sensitive Life Contracts [Member]
   
Policyholders' account balances, funding agreement 11,456,129 5,327,169
Individual Annuities [Member]
   
Policyholders' account balances, funding agreement 1,624,523 1,736,810
Guaranteed Investment Contracts And Guaranteed Interest Accounts Member [Member]
   
Policyholders' account balances, funding agreement 450,738 820,502
Other Policies [Member]
   
Policyholders' account balances, funding agreement $ 771,941 $ 672,596