Employee Benefit Plans And Other Postretirement Benefits (Schedule Of Reconciliation Of The Fair Value Measurements Using Significant Unobservable Inputs) (Details) (Pension Plan Assets [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Change in plan assets:
Fair value of plan assets, end of period		$ 1,539,018
Limited Partnership Interests [Member]
Change in plan assets:
Fair value of plan assets, end of period		35,954
Other [Member]
Change in plan assets:
Fair value of plan assets, end of period		628
Significant Unobservable Inputs (Level 3) [Member]
Change in plan assets:
Fair value of plan assets, beginning of period	36,582	42,127
Relating to assets still held at the reporting date	2,951	(820)
Purchases, sales and settlements	(5,299)	(4,725)
Fair value of plan assets, end of period	34,234	36,582
Significant Unobservable Inputs (Level 3) [Member] | Limited Partnership Interests [Member]
Change in plan assets:
Fair value of plan assets, beginning of period	35,954	40,016
Relating to assets still held at the reporting date	2,951	(930)
Purchases, sales and settlements	(4,671)	(3,132)
Fair value of plan assets, end of period	34,234	35,954
Significant Unobservable Inputs (Level 3) [Member] | Other [Member]
Change in plan assets:
Fair value of plan assets, beginning of period	628	2,111
Relating to assets still held at the reporting date	0	110
Purchases, sales and settlements	(628)	(1,593)
Fair value of plan assets, end of period	$ 0	$ 628