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Pension Plan and Other Postretirement Benefits (Tables) | 9 Months Ended
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Sep. 30, 2021
Retirement Benefits [Abstract] |
Schedule of Net Benefit Costs | 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 |
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 |
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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- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
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