Pension, Savings, And Other Employee Benefits (Schedule Of Components Of Net Periodic Benefit Cost) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Pension Plans Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 10	$ 10	$ 20	$ 20
Interest cost	7,882	9,020	15,764	18,040
Expected return on plan assets	(9,772)	(9,391)	(19,545)	(18,783)
Amortization of unrecognized, Prior service cost/(credit)	50	83	99	166
Amortization of unrecognized, Actuarial (gain)/loss	2,067	2,395	4,135	4,791
Net periodic benefit cost	237	2,117	473	4,234
Other Postretirement Benefit Plans Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	27	38	55	75
Interest cost	317	360	634	720
Expected return on plan assets	(229)	(242)	(458)	(483)
Amortization of unrecognized, Prior service cost/(credit)	42	(291)	85	(582)
Amortization of unrecognized, Actuarial (gain)/loss	(232)	(244)	(465)	(488)
Net periodic benefit cost	$ (75)	$ (379)	$ (149)	$ (758)