Benefit Plans (Schedule Of Defined Benefit Plans Disclosures) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Net Unfunded Status of Plans [Roll Forward]
Service cost	$ (1,253)	$ (1,298)	$ (2,506)	$ (2,595)
Interest cost	(6,739)	(7,455)	(13,478)	(14,910)
Expected return on assets	7,443	8,277	14,886	16,553
Regulatory Assets Related to Pensions [Roll Forward]
Amortization of prior service cost	(475)	(543)	(950)	(1,086)
Defined Benefit Plan, Amortization of Gain (Loss)	$ (1,207)	$ (1,536)	$ (2,414)	$ (3,072)