Benefit Plans (Schedule Of Net Periodic Benefit Costs) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Retirement Benefits [Abstract]
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)
Amortization of prior service cost	475	543	1,425	1,629
Amortization of actuarial loss	1,207	1,536	3,621	4,608
Net periodic benefit cost	$ 2,231	$ 2,554	$ 6,693	$ 7,664