Pension Plans And Other Postretirement Benefit Plans (Components Of Net Periodic Benefit Cost) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 3,868	$ 4,743	$ 12,754	$ 14,229
Interest cost	6,706	5,978	20,118	17,934
Expected return on plan assets	(8,110)	(6,900)	(24,330)	(20,700)
Amortization of prior service cost	6	75	18	225
Net loss recognition	1,163	3,220	2,334	9,989
Net periodic benefit cost	3,633	7,116	10,894	21,677
Other Post-Retirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	499	971	1,972	3,035
Interest cost	1,353	1,373	4,059	4,153
Expected return on plan assets	(472)	(402)	(1,416)	(1,202)
Amortization of prior service cost	(43)	(37)	(129)	(111)
Net loss recognition	826	1,395	2,001	4,342
Net periodic benefit cost	$ 2,163	$ 3,300	$ 6,487	$ 10,217