Benefit Plans (Schedule Of Defined Benefit Plans Disclosures) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Net Unfunded Status of Plans [Roll Forward]
Service cost	$ (1,253)	$ (1,297)	$ (3,759)	$ (3,892)
Interest cost	(6,739)	(7,455)	(20,217)	(22,365)
Expected return on assets	7,443	8,277	22,329	24,830
Regulatory Assets Related to Pensions [Roll Forward]
Amortization of prior service cost	(475)	(543)	(1,425)	(1,629)
Defined Benefit Plan, Amortization of Gain (Loss)	$ (1,207)	$ (1,536)	$ (3,621)	$ (4,608)