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Pension And Other Post-Retirement Benefits (Tables) | 6 Months Ended
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Jun. 30, 2017
Compensation and Retirement Disclosure [Abstract] |
Schedule Of Components Of Net Periodic Benefit Cost For Pension And Other Post-Retirement Benefit Programs | The components of net periodic benefit cost for the pension and other post-retirement benefit programs reflected in consolidated results are shown below:
| Pension Benefits |  | Other Post-Retirement Benefits
| Three Months Ended June 30, |  | Three Months Ended June 30,
(In Thousands) | 2017 |  | 2016 |  | 2017 |  | 2016
Service cost | $ | 58 |  |  | $ | 52 |  |  | $ | 9 |  |  | $ | 10 |
Interest cost | 3,164 |  |  | 3,365 |  |  | 77 |  |  | 84 |
Expected return on plan assets | (3,737 | ) |  | (3,979 | ) |  | — |  |  | — |
Amortization of prior service costs, gains or losses and net transition asset | 3,122 |  |  | 3,384 |  |  | (62 | ) |  | (47 | )
Net periodic benefit cost | $ | 2,607 |  |  | $ | 2,822 |  |  | $ | 24 |  |  | $ | 47 |
| Pension Benefits |  | Other Post-Retirement Benefits
| Six Months Ended June 30, |  | Six Months Ended June 30,
| 2017 |  | 2016 |  | 2017 |  | 2016
Service cost | $ | 116 |  |  | $ | 124 |  |  | $ | 18 |  |  | $ | 21 |
Interest cost | 6,328 |  |  | 6,730 |  |  | 153 |  |  | 169 |
Expected return on plan assets | (7,473 | ) |  | (7,957 | ) |  | — |  |  | — |
Amortization of prior service costs, (gains) losses and net transition asset | 6,245 |  |  | 6,768 |  |  | (123 | ) |  | (95 | )
Net periodic benefit cost | $ | 5,216 |  |  | $ | 5,665 |  |  | $ | 48 |  |  | $ | 95 |

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