Pension Plans And Other Postretirement Benefits (Components Of Net Periodic Benefit Costs) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 925	$ 1,143
Interest cost	3,222	3,512
Expected return on plan assets	(4,674)	(4,305)
Amortization of prior service cost	43	69
Amortization of actuarial loss	1,532	500
Net periodic benefit cost	1,048	919
Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	406	312
Interest cost	758	737
Expected return on plan assets	(730)	(683)
Amortization of prior service cost	(54)	(74)
Amortization of actuarial loss	354	82
Net periodic benefit cost	$ 734	$ 374