Significant Accounting Policies (Liabilities for Future Life Insurance) (Details)	12 Months Ended
Dec. 31, 2012
Years of Issue, 1947 - 1968 [Member]
Schedule of Liability for Life Insurance [Line Items]
Interest Rate	4.00%
Years of Issue, 1969 - 1978 [Member]
Schedule of Liability for Life Insurance [Line Items]
Interest Rate, High End	6.00%
Interest Rate, Low End	5.00%
Years of Issue, 1979 - 2003 [Member]
Schedule of Liability for Life Insurance [Line Items]
Interest Rate, High End	7.00%
Interest Rate, Low End	6.00%
Years of Issue, 2004 - 2011 [Member]
Schedule of Liability for Life Insurance [Line Items]
Interest Rate	5.25%

Maximum interest rate for traditional life contracts in the range of interest rates used to calculate future benefits to be paid to or on behalf of policyholders and related expenses less the present value of future net premiums using assumptions such as estimates of expected investment yields, mortality, morbidity, terminations and expenses, applicable at the time the insurance contracts are made and costs of settling insured claims and costs incurred in the claims settlement process of traditional life.

+ References+ Details

Minimum interest rate for traditional life contracts in the range of interest rates used to calculate future benefits to be paid to or on behalf of policyholders and related expenses less the present value of future net premiums using assumptions such as estimates of expected investment yields, mortality, morbidity, terminations and expenses, applicable at the time the insurance contracts are made and costs of settling insured claims and costs incurred in the claims settlement process of traditional life.

+ References+ Details