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Defined Benefit Plans (Tables) | 9 Months Ended
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Sep. 30, 2021
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract] |
Schedule of Costs of Retirement Plans | The components of net periodic pension cost are as follows (dollars in thousands):
|  | Pension Plans
|  | Three months ended September 30, |  | Nine months ended September 30,
|  | 2021 |  | 2020 |  | 2021 |  | 2020
Service costs |  | $ | 330 |  |  | $ | 320 |  |  | $ | 980 |  |  | $ | 950 |
Interest costs |  | 200 |  |  | 240 |  |  | 600 |  |  | 710 |
Expected return on plan assets |  | (380) |  |  | (380) |  |  | (1,160) |  |  | (1,110) |
Amortization of net loss |  | 220 |  |  | 220 |  |  | 680 |  |  | 670 |
Net periodic benefit cost |  | $ | 370 |  |  | $ | 400 |  |  | $ | 1,100 |  |  | $ | 1,220 |

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- Definition Tabular disclosure of the costs related to the various types of retirement plans including defined benefit pension plan cost, defined contribution plan cost, other postretirement benefit plan cost, and net periodic benefit cost. + 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 -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
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