Significant Accounting Policies Significant Accounting Policies (Policy Liabilities) (Details)	Dec. 31, 2016
Future Life Insurance Policy Benefits, Years of Issue, 1947 - 1968 [Member]
Schedule of Liability for Life Insurance [Line Items]
Interest Rate	4.00%
Future Life Insurance Policy Benefits, Years of Issue, 1969 - 1978 [Member] | Minimum [Member]
Schedule of Liability for Life Insurance [Line Items]
Interest Rate	6.00%
Future Life Insurance Policy Benefits, Years of Issue, 1969 - 1978 [Member] | Maximum [Member]
Schedule of Liability for Life Insurance [Line Items]
Interest Rate	5.00%
Future Life Insurance Policy Benefits, Years of Issue, 1979 - 2003 [Member] | Minimum [Member]
Schedule of Liability for Life Insurance [Line Items]
Interest Rate	7.00%
Future Life Insurance Policy Benefits, Years of Issue, 1979 - 2003 [Member] | Maximum [Member]
Schedule of Liability for Life Insurance [Line Items]
Interest Rate	6.00%
Future Life Insurance Policy Benefits, Years of Issue, 2004 - 2012 [Member]
Schedule of Liability for Life Insurance [Line Items]
Interest Rate	5.25%
Future Life Insurance Policy Benefits, Years of Issue, 2013 - 2016 [Member]
Schedule of Liability for Life Insurance [Line Items]
Interest Rate	4.25%