Pension, Savings, And Other Employee Benefits (Schedule Of Components Of Net Periodic Benefit Cost) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Pension Plans Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 10	$ 17
Interest cost	9,020	8,660
Expected return on plan assets	(9,392)	(10,018)
Amortization of unrecognized, Prior service cost/(credit)	83	87
Amortization of unrecognized, Actuarial (gain)/loss	2,396	1,635
Net periodic benefit cost	2,117	381
Other Postretirement Benefit Plans Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	37	55
Interest cost	360	458
Expected return on plan assets	(241)	(255)
Amortization of unrecognized, Prior service cost/(credit)	(291)	(291)
Amortization of unrecognized, Actuarial (gain)/loss	(244)	(126)
Net periodic benefit cost	$ (379)	$ (159)