Benefit Plans (Schedule Of Net Periodic Benefit Costs) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Retirement Benefits [Abstract]
Service cost	$ 1,253	$ 1,297
Interest cost	6,739	7,455
Expected return on assets	(7,443)	(8,276)
Amortization of prior service cost	475	543
Amortization of actuarial loss	1,207	1,536
Net periodic benefit cost	$ 2,231	$ 2,555