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Defined Benefit Pension Plans | 6 Months Ended
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Jun. 30, 2022
Retirement Benefits [Abstract] |
Defined Benefit Pension Plans | 6. Defined Benefit Pension Plans Net periodic benefit related to all of the Company's defined benefit pension plans recognized in the Company's unaudited Condensed Consolidated Statements of Operations for the three and six months ended June 30, 2022 and 2021 included the following components:
|  | Three Months Ended |  |  | Six Months Ended |
(in thousands) |  | June 30, 2022 |  |  | June 30, 2021 |  |  | June 30, 2022 |  |  | June 30, 2021 |
Service cost |  | $ | 339 |  |  | $ | 316 |  |  | $ | 684 |  |  | $ | 619 |
Interest cost |  |  | 3,379 |  |  |  | 2,857 |  |  |  | 6,773 |  |  |  | 5,675 |
Expected return on assets |  |  | (6,388 | ) |  |  | (6,350 | ) |  |  | (12,807 | ) |  |  | (12,620 | )
Amortization of actuarial loss |  |  | 2,500 |  |  |  | 2,529 |  |  |  | 5,027 |  |  |  | 5,171 |
Net periodic (benefit) |  | $ | (170 | ) |  | $ | (648 | ) |  | $ | (323 | ) |  | $ | (1,155 | )
For the three months ended June 30, 2022 and 2021, the non-service components of net periodic pension benefit of $(509,000) and $(964,000), respectively, are included in "Other Income, net" on the unaudited Condensed Consolidated Statement of Operations. For the six months ended June 30, 2022 and 2021, the non-service components of net periodic pension benefit of $(1,007,000) and $(1,774,000), respectively, are included in "Other Income, net" on the unaudited Condensed Consolidated Statement of Operations. For the six months ended June 30, 2022, the Company made no contributions to the U.S. defined benefit pension plan and $325,000 to the U.K. defined benefit pension plans, as compared with $4,500,000 of contributions to the U.S. defined benefit pension plan and $358,000 to the U.K. defined benefit pension plans during the six months ended June 30, 2021, respectively.

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