Pension Plans And Other Postretirement Benefit Plans (Components Of Net Periodic Benefit Cost) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 3,868	$ 4,743	$ 8,886	$ 9,486
Interest cost	6,706	5,978	13,412	11,956
Expected return on plan assets	(8,110)	(6,900)	(16,220)	(13,800)
Amortization of prior service cost	6	75	12	150
Net loss recognition	14	3,222	1,171	6,769
Net periodic benefit cost	2,484	7,118	7,261	14,561
Other Post-Retirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	499	1,032	1,473	2,064
Interest cost	1,353	1,390	2,706	2,780
Expected return on plan assets	(472)	(400)	(944)	(800)
Amortization of prior service cost	(43)	(37)	(86)	(74)
Net loss recognition	349	1,426	1,175	2,947
Net periodic benefit cost	$ 1,686	$ 3,411	$ 4,324	$ 6,917