Pension, Savings, And Other Employee Benefits (Narrative) (Details) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2015	Dec. 31, 2014
Defined Benefit Plan Disclosure [Line Items]
Estimated social security benefits age			65 years
Other Postretirement Benefit Plans Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
ACS 715 curtailment gain	$ 8,283,000	$ 0	$ 8,283,000	$ 0
Tax Affected Adjustment To Accumulated Other Comprehensive Income	$ 5,300,000		5,300,000
Reduction in projected benefit obligation			$ 1,000,000
Non Qualified Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Contributions to non-qualified plans						$ 5,000,000
Expected pension contribution					$ 5,000,000
Savings Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Employer investment in qualified defined contribution plan			100.00%	100.00%
Maximum percent of employee pre-tax contributions that may be matched by the Company			6.00%	6.00%