Benefit Plans (Schedule Of Net Periodic Benefit Costs) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Retirement Benefits [Abstract]
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)
Amortization of prior service cost	475	543	950	1,086
Amortization of actuarial loss	1,207	1,536	2,414	3,072
Net periodic benefit cost	$ 2,231	$ 2,555	$ 4,462	$ 5,110