Benefit Plans (Schedule Of Defined Benefit Plans Disclosures) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Net Unfunded Status of Plans [Roll Forward]
Service cost	$ (1,253)	$ (1,297)
Interest cost	(6,739)	(7,455)
Expected return on assets	7,443	8,276
Regulatory Assets Related to Pensions [Roll Forward]
Amortization of prior service cost	(475)	(543)
Defined Benefit Plan, Amortization of Gain (Loss)	$ (1,207)	$ (1,536)