Pension, Savings, And Other Employee Benefits (Schedule Of Components Of Net Periodic Benefit Cost) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Pension Plans Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 2,453	$ 2,917	$ 11,156	$ 11,519
Interest cost	8,191	8,323	24,780	24,617
Expected return on plan assets	(9,967)	(11,717)	(29,860)	(35,164)
Amortization of unrecognized, Transition obligation	0	0	0	0
Amortization of unrecognized, Prior service cost/(credit)	100	104	299	313
Actuarial (gain)/loss	9,351	5,861	26,999	15,914
Net periodic benefit cost	10,128	5,488	33,374	17,199
ASC 715 settlement expense	1,231	0	1,231	0
Total periodic benefit costs	11,359	5,488	34,605	17,199
Other Postretirement Benefit Plans Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	102	119	350	407
Interest cost	612	556	1,724	1,660
Expected return on plan assets	(225)	(296)	(686)	(892)
Amortization of unrecognized, Transition obligation	184	246	552	740
Amortization of unrecognized, Prior service cost/(credit)	(3)	(2)	(7)	(7)
Actuarial (gain)/loss	(60)	(273)	(366)	(793)
Net periodic benefit cost	610	350	1,567	1,115
ASC 715 settlement expense	0	0	0	0
Total periodic benefit costs	$ 610	$ 350	$ 1,567	$ 1,115