Retirement And Other Employee Benefits (Weighted Average Assumptions Used To Determine Net Periodic Benefit Cost) (Details)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Qualified Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Discount rate	4.09%	4.98%	4.12%
Expected long-term return on plan assets	6.75%	6.75%	6.75%
Nonqualified Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Discount rate	3.77%	4.64%	3.71%
Expected long-term return on plan assets	0.00%	0.00%	0.00%
Retirement Health Benefits
Defined Benefit Plan Disclosure [Line Items]
Discount rate	4.07%	4.99%	4.12%
Expected long-term return on plan assets	6.75%	6.75%	6.75%
Minimum
Defined Benefit Plan Disclosure [Line Items]
Rate of compensation increased	3.25%
Maximum
Defined Benefit Plan Disclosure [Line Items]
Rate of compensation increased	9.30%