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Pension Plan and Other Postretirement Benefits | 9 Months Ended
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Sep. 30, 2021
Retirement Benefits [Abstract] |
Pension Plan and Other Postretirement Benefits | Pension Plan and Other Postretirement Benefits Pension Plan Components of net periodic pension benefit cost for the three and nine months ended September 30, 2021 and 2020 are as follows:
| Three Months Ended September 30, |  | Nine Months Ended September 30,
(in thousands) | 2021 |  | 2020 |  | 2021 |  | 2020
Service Cost–Benefit Earned During the Period | $ | 1,866 |  |  | $ | 1,655 |  |  | $ | 5,597 |  |  | $ | 4,966 |
Interest Cost on Projected Benefit Obligation | 2,915 |  |  | 3,264 |  |  | 8,745 |  |  | 9,790 |
Expected Return on Assets | (5,590) |  |  | (5,506) |  |  | (16,769) |  |  | (16,516) |
Amortization of Net Actuarial Loss: |  |  |  |  |  |  |
From Regulatory Asset | 2,660 |  |  | 2,231 |  |  | 7,981 |  |  | 6,693 |
From Other Comprehensive Income | 68 |  |  | 55 |  |  | 204 |  |  | 165 |
Net Periodic Pension Cost | $ | 1,919 |  |  | $ | 1,699 |  |  | $ | 5,758 |  |  | $ | 5,098 |
We had no minimum funding requirement as of December 31, 2020 but made a discretionary plan contribution of $10.0 million in January 2021. Executive Survivor and Supplemental Retirement Plan (ESSRP) Components of net periodic pension benefit cost for the three and nine months ended September 30, 2021 and 2020 are as follows:
| Three Months Ended September 30, |  | Nine Months Ended September 30,
(in thousands) | 2021 |  | 2020 |  | 2021 |  | 2020
Service Cost–Benefit Earned During the Period | $ | 47 |  |  | $ | 45 |  |  | $ | 140 |  |  | $ | 134 |
Interest Cost on Projected Benefit Obligation | 307 |  |  | 362 |  |  | 921 |  |  | 1,086 |
Amortization of Net Actuarial Loss: |  |  |  |  |  |  |
From Regulatory Asset | 30 |  |  | 24 |  |  | 92 |  |  | 71 |
From Other Comprehensive Income | 124 |  |  | 85 |  |  | 373 |  |  | 256 |
Net Periodic Pension Cost | $ | 508 |  |  | $ | 516 |  |  | $ | 1,526 |  |  | $ | 1,547 |
Other Postretirement Benefits Components of net periodic postretirement benefit cost for the three and nine months ended September 30, 2021 and 2020 are as follows:
| Three Months Ended September 30, |  | Nine Months Ended September 30,
(in thousands) | 2021 |  | 2020 |  | 2021 |  | 2020
Service Cost–Benefit Earned During the Period | $ | 430 |  |  | $ | 461 |  |  | $ | 1,291 |  |  | $ | 1,385 |
Interest Cost on Projected Benefit Obligation | 472 |  |  | 598 |  |  | 1,418 |  |  | 1,795 |
Amortization of Prior Service Cost |  |  |  |  |  |  |
From Regulatory Asset | (1,397) |  |  | (1,169) |  |  | (4,192) |  |  | (3,508) |
From Other Comprehensive Income | (35) |  |  | (28) |  |  | (107) |  |  | (86) |
Amortization of Net Actuarial Loss |  |  |  |  |  |  |
From Regulatory Asset | 919 |  |  | 1,051 |  |  | 2,759 |  |  | 3,154 |
From Other Comprehensive Income | 24 |  |  | 26 |  |  | 71 |  |  | 78 |
Net Periodic Postretirement Benefit Cost | $ | 413 |  |  | $ | 939 |  |  | $ | 1,240 |  |  | $ | 2,818 |

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