Pension Plans and Other Postretirement Employee Benefits (Components Of Net Periodic Cost (Benefit)) (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 Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 1,339	$ 1,246	$ 2,540	$ 2,659
Interest cost	4,783	4,458	9,592	8,912
Expected return on plan assets	(6,126)	(6,522)	(12,256)	(13,046)
Amortization of prior service cost (credit)	187	195	374	390
Amortization of actuarial loss	3,606	5,021	7,226	9,965
Net periodic cost (benefit)	3,789	4,398	7,476	8,880
Other Postretirement Employee Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	(11)	23	12	46
Interest cost	372	447	871	905
Expected return on plan assets	0	0	0	0
Amortization of prior service cost (credit)	(2,410)	(2,427)	(4,820)	(4,854)
Amortization of actuarial loss	414	790	1,093	1,605
Net periodic cost (benefit)	$ (1,635)	$ (1,167)	$ (2,844)	$ (2,298)