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Pension Plans And Other Postretirement Benefits (Components Of Net Periodic Benefit Cost) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Pension Benefits [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Service cost | $ 358 | $ 400 | $ 1,072 | $ 1,201
Interest cost | 3,908 | 4,309 | 11,724 | 12,926
Expected return on plan assets | (4,696) | (5,673) | (14,088) | (17,018)
Amortization of prior service cost | 82 | 171 | 244 | 513
Amortization of actuarial (gain) loss | 751 | 810 | 2,253 | 2,428
Net periodic benefit cost | 403 | 17 | 1,205 | 50
Other Postretirement Benefits [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Service cost | 363 | 337 | 1,089 | 1,011
Interest cost | 1,113 | 1,119 | 3,337 | 3,357
Expected return on plan assets | (1,105) | (1,093) | (3,315) | (3,279)
Amortization of actuarial (gain) loss | (267) | (329) | (801) | (988)
Net periodic benefit cost | $ 104 | $ 34 | $ 310 | $ 101

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