Pension, Savings, And Other Employee Benefits (Schedule Of Components Of Net Periodic Benefit Cost) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Pension Plans Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 10	$ 10	$ 30	$ 30
Interest cost	7,648	9,278	23,412	27,318
Expected return on plan assets	(9,797)	(9,354)	(29,342)	(28,137)
Amortization of unrecognized, Prior service cost/(credit)	48	84	147	250
Amortization of unrecognized, Actuarial (gain)/loss	1,971	2,786	6,106	7,577
Net periodic benefit cost/(credit)	(120)	2,804	353	7,038
ASC 715 curtailment gain	0	0	0	0
Total periodic benefit cost/(credit)	(120)	2,804	353	7,038
Other Postretirement Benefit Plans Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	28	37	83	112
Interest cost	335	342	969	1,062
Expected return on plan assets	(227)	(243)	(685)	(726)
Amortization of unrecognized, Prior service cost/(credit)	43	(291)	128	(873)
Amortization of unrecognized, Actuarial (gain)/loss	(143)	(334)	(608)	(822)
Net periodic benefit cost/(credit)	36	(489)	(113)	(1,247)
ASC 715 curtailment gain	0	(8,283)	0	(8,283)
Total periodic benefit cost/(credit)	$ 36	$ (8,772)	$ (113)	$ (9,530)