Employee Benefit Plans And Other Postretirement Benefits (Components Of Net Periodic Benefit Costs) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Pension and SERPA Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	$ 35,987	$ 33,681	$ 37,341
Interest cost	79,248	83,265	80,805
Expected return on plan assets	(127,327)	(117,110)	(106,612)
Prior service cost (credit)	1,746	2,958	2,981
Net loss	58,608	43,874	30,266
Net curtailment loss	0	0	236
Settlement loss	0	6,242	274
Net periodic benefit cost	48,262	52,910	45,291
Postretirement Healthcare Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	7,858	7,413	7,630
Interest cost	15,599	18,310	19,644
Expected return on plan assets	(9,537)	(9,423)	(9,386)
Prior service cost (credit)	(3,853)	(3,853)	(3,878)
Net loss	8,549	7,421	7,192
Net curtailment loss	0	0	0
Settlement loss	0	0	0
Net periodic benefit cost	$ 18,616	$ 19,868	$ 21,202