Pension and Other Postretirement Employee Benefits (Components Of Net Periodic Cost (Benefit)) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 1,267	$ 1,322	$ 2,533	$ 2,643
Interest cost	3,230	3,122	6,458	6,245
Expected return on plan assets	(2,933)	(3,237)	(5,865)	(6,474)
Amortization of prior service cost	0	5	0	10
Amortization of actuarial (gain) loss	43	20	86	40
Total net periodic cost	1,607	1,232	3,212	2,464
OPEB [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	14	24	28	47
Interest cost	251	219	503	438
Expected return on plan assets	0	0	0	0
Amortization of prior service cost	0	0	0	0
Amortization of actuarial (gain) loss	(240)	(330)	(480)	(661)
Total net periodic cost	$ 25	$ (87)	$ 51	$ (176)