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, 2014	Mar. 31, 2013
Pension Plans Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 17	$ 62
Interest cost	8,660	8,085
Expected return on plan assets	(10,018)	(8,727)
Amortization of unrecognized, Prior service cost/(credit)	87	88
Amortization of unrecognized, Actuarial (gain)/loss	1,635	2,400
Net periodic benefit cost	381	1,908
Other Postretirement Benefit Plans Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	55	134
Interest cost	458	548
Expected return on plan assets	(255)	(197)
Amortization of unrecognized, Prior service cost/(credit)	(291)	8
Amortization of unrecognized, Actuarial (gain)/loss	(126)	17
Net periodic benefit cost	$ (159)	$ 510