Pension, Savings, And Other Employee Benefits (Schedule Of Components Of Net Periodic Benefit Cost) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Pension Plans Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 62	$ 4,351	$ 124	$ 8,703
Interest cost	8,089	8,295	16,174	16,589
Expected return on plan assets	(8,727)	(9,947)	(17,454)	(19,893)
Amortization of unrecognized, Transition obligation	0	0	0	0
Amortization of unrecognized, Prior service cost/(credit)	88	100	176	199
Amortization of unrecognized, Actuarial (gain)/loss	2,389	8,824	4,789	17,648
Net periodic benefit cost	1,901	11,623	3,809	23,246
ASC 715 settlement expense	370	0	370	0
Total periodic benefit costs	2,271	11,623	4,179	23,246
Other Postretirement Benefit Plans Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	134	124	268	248
Interest cost	548	556	1,096	1,112
Expected return on plan assets	(197)	(230)	(394)	(461)
Amortization of unrecognized, Transition obligation	0	184	0	368
Amortization of unrecognized, Prior service cost/(credit)	8	(2)	16	(4)
Amortization of unrecognized, Actuarial (gain)/loss	17	(153)	34	(306)
Net periodic benefit cost	510	479	1,020	957
ASC 715 settlement expense	0	0	0	0
Total periodic benefit costs	$ 510	$ 479	$ 1,020	$ 957