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Pension and Other Postretirement Plans (Tables) | 9 Months Ended
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Sep. 30, 2021
Compensation and Retirement Disclosure [Abstract] |
Schedule of Net Periodic Benefit Costs | The following table presents the components of net periodic benefit costs recognized.
|  | Three Months Ended |  |  | Nine Months Ended |
|  | September 30, |  |  | September 30, |
(In thousands) |  | 2021 |  |  | 2020 |  |  | 2021 |  |  | 2020 |
Pension Benefits |  |  |  |  |  |  |  |  |  |  |  |
Components of net periodic benefit cost: |  |  |  |  |  |  |  |  |  |  |  |
Service cost |  | $ | 1,432 |  |  | $ | 1,324 |  |  | $ | 4,296 |  |  | $ | 3,972 |
Interest cost |  |  | 2,280 |  |  |  | 3,052 |  |  |  | 6,840 |  |  |  | 9,157 |
Expected return on assets |  |  | (7,372 | ) |  |  | (6,807 | ) |  |  | (22,115 | ) |  |  | (20,422 | )
Amortization of: |  |  |  |  |  |  |  |  |  |  |  |
Prior service credit |  |  | (31 | ) |  |  | (31 | ) |  |  | (93 | ) |  |  | (93 | )
Actuarial loss |  |  | 1,662 |  |  |  | 1,339 |  |  |  | 4,985 |  |  |  | 4,018 |
Net periodic benefit (credit) cost |  | $ | (2,029 | ) |  | $ | (1,123 | ) |  | $ | (6,087 | ) |  | $ | (3,368 | )
Postretirement Benefits |  |  |  |  |  |  |  |  |  |  |  |
Components of net periodic benefit cost: |  |  |  |  |  |  |  |  |  |  |  |
Service cost |  | $ | 362 |  |  | $ | 316 |  |  | $ | 1,086 |  |  | $ | 948 |
Interest cost |  |  | 387 |  |  |  | 570 |  |  |  | 1,161 |  |  |  | 1,709 |
Expected return on assets |  |  | (819 | ) |  |  | (789 | ) |  |  | (2,457 | ) |  |  | (2,366 | )
Amortization of: |  |  |  |  |  |  |  |  |  |  |  |
Transition obligation |  |  | 1 |  |  |  | 1 |  |  |  | 2 |  |  |  | 2 |
Prior service credit |  |  | (379 | ) |  |  | (667 | ) |  |  | (1,138 | ) |  |  | (2,001 | )
Actuarial loss |  |  | 123 |  |  |  | 55 |  |  |  | 370 |  |  |  | 165 |
Net periodic benefit (credit) cost |  | $ | (325 | ) |  | $ | (514 | ) |  | $ | (976 | ) |  | $ | (1,543 | )

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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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