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Pension Plan and Other Postretirement Benefits (Tables) | 3 Months Ended
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Mar. 31, 2022
Retirement Benefits [Abstract] |
Schedule of Net Benefit Costs | The following table includes the components of net periodic benefit cost of our defined benefit pension plans and other postretirement benefits for the three months ended March 31, 2022 and 2021:
| Pension Benefits (Pension Plan) |  | Pension Benefits (ESSRP) |  | Postretirement Benefits
(in thousands) | 2022 |  | 2021 |  | 2022 |  | 2021 |  | 2022 |  | 2021
Service Cost | $ | 1,644 |  |  | $ | 1,866 |  |  | $ | 49 |  |  | $ | 47 |  |  | $ | 335 |  |  | $ | 430 |
Interest Cost | 3,086 |  |  | 2,915 |  |  | 335 |  |  | 307 |  |  | 510 |  |  | 473 |
Expected Return on Assets | (5,921) |  |  | (5,590) |  |  | — |  |  | — |  |  | — |  |  | — |
Amortization of Prior Service Cost | — |  |  | — |  |  | — |  |  | — |  |  | (1,433) |  |  | (1,433) |
Amortization of Net Actuarial Loss | 1,966 |  |  | 2,728 |  |  | 142 |  |  | 155 |  |  | 766 |  |  | 943 |
Net Periodic Benefit Cost | $ | 775 |  |  | $ | 1,919 |  |  | $ | 526 |  |  | $ | 509 |  |  | $ | 178 |  |  | $ | 413 |
The following table includes the impact of regulation on the recognition of periodic benefit cost arising from pension and other postretirement benefits for the three months ended March 31, 2022 and 2021:
(in thousands) | 2022 |  | 2021
Net Periodic Benefit Cost | $ | 1,479 |  |  | $ | 2,841 |
Net Amount Amortized (Deferred) Due to the Effect of Regulation | 527 |  |  | (115) |
Net Periodic Benefit Cost Recognized | $ | 2,006 |  |  | $ | 2,726 |

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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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