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, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Pension Plans Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 10	$ 17	$ 20	$ 34
Interest cost	9,020	8,660	18,040	17,320
Expected return on plan assets	(9,391)	(10,018)	(18,783)	(20,036)
Amortization of unrecognized, Prior service cost/(credit)	83	87	166	174
Amortization of unrecognized, Actuarial (gain)/loss	2,395	1,635	4,791	3,270
Net periodic benefit cost	2,117	381	4,234	762
Other Postretirement Benefit Plans Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	38	55	75	110
Interest cost	360	458	720	916
Expected return on plan assets	(242)	(255)	(483)	(510)
Amortization of unrecognized, Prior service cost/(credit)	(291)	(291)	(582)	(582)
Amortization of unrecognized, Actuarial (gain)/loss	(244)	(252)	(488)	(378)
Net periodic benefit cost	$ (379)	$ (285)	$ (758)	$ (444)