Pension, Savings, And Other Employee Benefits (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended		3 Months Ended
	Mar. 31, 2015	Dec. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
Defined Benefit Plan Disclosure [Line Items]
Estimated social security benefits age	65 years 0 months
Non Qualified Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Contributions to non-qualified plans		$ 5.0	$ 5.0
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%