Pensions And Other Employee Benefits Plans (Components Of Net Periodic Cost) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 12,113	$ 12,265	$ 10,677
Interest cost	21,675	25,504	24,673
Expected return on plan assets	(20,632)	(23,552)	(20,641)
Recognition due to curtailment	(1,497)
Amortization of prior service credits	(2,266)	(2,719)	(2,719)
Amortization of net actuarial loss (gain)	9,773	5,379	3,536
Net periodic cost	19,166	16,877	15,526
Net periodic cost included in income from discontinued operations	18,003	14,703	13,555
Net periodic cost included in income from continuing operations	1,163	2,174	1,971
Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	447	522	672
Interest cost	2,597	3,198	3,411
Expected return on plan assets	(1)	(12)	(31)
Amortization of prior service credits	(611)	(728)	(728)
Amortization of net actuarial loss (gain)	(279)	(1,056)	(1,118)
Net periodic cost	2,153	1,924	2,206
Net periodic cost included in income from discontinued operations	2,114	1,890	2,230
Net periodic cost included in income from continuing operations	$ 39	$ 34	$ (24)