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Pension and postretirement benefits (Tables) | 9 Months Ended
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Sep. 30, 2019
Compensation And Retirement Disclosure [Abstract] |
Components of Net Periodic Pension/Postretirement Benefit Cost |
|  | Pension Plans |  | OPEB Plan
|  | Quarters ended September 30, |  | Quarters ended September 30,
(In thousands) |  | 2019 |  | 2018 |  | 2019 |  | 2018
Personnel Cost: |  |  |  |  |  |  |  |
Service cost | $ | - | $ | - | $ | 190 | $ | 257
Other operating expenses: |  |  |  |  |  |  |  |
Interest cost |  | 7,109 |  | 6,373 |  | 1,489 |  | 1,390
Expected return on plan assets |  | (8,096) |  | (10,060) |  | - |  | -
Amortization of prior service cost/(credit) |  | - |  | - |  | - |  | (868)
Amortization of net loss |  | 5,877 |  | 5,065 |  | - |  | 321
Total net periodic pension cost | $ | 4,890 | $ | 1,378 | $ | 1,679 | $ | 1,100
|  | Pension Plans |  | OPEB Plan
|  | Nine months ended September 30, |  | Nine months ended September 30,
(In thousands) |  | 2019 |  | 2018 |  | 2019 |  | 2018
Personnel Cost: |  |  |  |  |  |  |  |
Service cost | $ | - | $ | - | $ | 570 | $ | 771
Other operating expenses: |  |  |  |  |  |  |  |
Interest cost |  | 21,329 |  | 19,119 |  | 4,466 |  | 4,171
Expected return on plan assets |  | (24,288) |  | (30,180) |  | - |  | -
Amortization prior service cost/(credit) |  | - |  | - |  | - |  | (2,603)
Amortization of net loss |  | 17,629 |  | 15,195 |  | - |  | 962
Total net periodic pension cost | $ | 14,670 | $ | 4,134 | $ | 5,036 | $ | 3,301
Schedule of accumulated and projected benefit obligations |
| For the quarters ended | For the year ending
(In thousands) | 30-Sep-19 | 31-Dec-19
Pension Plans | $ | 20,057 | $ | 20,229
OPEB Plan | $ | 1,472 | $ | 8,128

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- Definition Tabular disclosure of benefit obligations including accumulated benefit obligation and projected benefit obligation. + 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 (e) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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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=108410482&loc=d3e1928-114920 + Details
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