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Employee Benefit Plans (Tables) | 9 Months Ended
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Sep. 30, 2021
Retirement Benefits [Abstract] |
Schedule of Employee Benefit Plans | The components of net period benefit cost for the three and nine months ended September 30, 2021 and 2020, respectively, are as follows:
| Three Months Ended September 30, 2021
| Retirement Income Plan | National Service-Related Pension Plan | Other Post-Retirement Benefits | Superannuation | Total
Components of net periodic benefit cost: | (In thousands)
Service cost | $ | — |  | $ | — |  | $ | — |  | $ | 15 |  | $ | 15 |
Interest cost | 236 |  | 234 |  | 2 |  | 5 |  | 477 |
Expected return on plan assets | (596) |  | (428) |  | — |  | (18) |  | (1,042) |
Amortization of net loss | 219 |  | 163 |  | — |  | — |  | 382 |
Amortization of prior service cost | — |  | — |  | — |  | 7 |  | 7 |
Net pension benefit cost | $ | (141) |  | $ | (31) |  | $ | 2 |  | $ | 9 |  | $ | (161) |
| Three Months Ended September 30, 2020
| Retirement Income Plan | National Service-Related Pension Plan | Other Post-Retirement Benefits | Superannuation | Total
Components of net periodic benefit cost: | (In thousands)
Service cost | $ | — |  | $ | — |  | $ | — |  | $ | 18 |  | $ | 18 |
Interest cost | 315 |  | 279 |  | 4 |  | 8 |  | 606 |
Expected return on plan assets | (500) |  | (366) |  | — |  | (20) |  | (886) |
Amortization of net loss | 255 |  | 152 |  | — |  | — |  | 407 |
Amortization of prior service cost | — |  | — |  | — |  | 7 |  | 7 |
Net pension benefit cost | $ | 70 |  | $ | 65 |  | $ | 4 |  | $ | 13 |  | $ | 152 |
| Nine Months Ended September 30, 2021
| Retirement Income Plan | National Service-Related Pension Plan | Other Post-Retirement Benefits | Superannuation | Total
Components of net periodic benefit cost: | (In thousands)
Service cost | $ | — |  | $ | — |  | $ | — |  | $ | 47 |  | $ | 47 |
Interest cost | 710 |  | 702 |  | 6 |  | 15 |  | 1,433 |
Expected return on plan assets | (1,788) |  | (1,282) |  | — |  | (56) |  | (3,126) |
Amortization of net loss | 655 |  | 489 |  | — |  | — |  | 1,144 |
Amortization of prior service cost | — |  | — |  | — |  | 22 |  | 22 |
Net pension benefit cost | $ | (423) |  | $ | (91) |  | $ | 6 |  | $ | 28 |  | $ | (480) |
| Nine Months Ended September 30, 2020
| Retirement Income Plan | National Service-Related Pension Plan | Other Post-Retirement Benefits | Superannuation | Total
Components of net periodic benefit cost: | (In thousands)
Service cost | $ | — |  | $ | — |  | $ | — |  | $ | 46 |  | $ | 46 |
Interest cost | 946 |  | 838 |  | 11 |  | 20 |  | 1,815 |
Expected return on plan assets | (1,501) |  | (1,099) |  | — |  | (51) |  | (2,651) |
Amortization of net loss | 763 |  | 455 |  | — |  | — |  | 1,218 |
Amortization of prior service cost | — |  | — |  | — |  | 22 |  | 22 |
Net pension benefit cost | $ | 208 |  | $ | 194 |  | $ | 11 |  | $ | 37 |  | $ | 450 |

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- Definition Tabular disclosure of one or more of the entity's defined benefit pension plans or one or more other defined benefit postretirement plans, separately for pension plans and other postretirement benefit plans including the entity's schedule of fair value of plan assets for defined benefit or other postretirement plans. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=123450688&loc=d3e4179-114921 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e2439-114920 Reference 3: 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 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e2410-114920 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e2417-114920 + Details
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