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Defined Benefit Pension Plans | 9 Months Ended
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Sep. 30, 2023
Retirement Benefits [Abstract] |
Defined Benefit Pension Plans | 6. Defined Benefit Pension Plans Net periodic cost (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 nine months ended September 30, 2023 and 2022 included the following components:
|  | Three Months Ended |  |  | Nine Months Ended |
(in thousands) |  | September 30, 2023 |  |  | September 30, 2022 |  |  | September 30, 2023 |  |  | September 30, 2022 |
Service cost |  | $ | 362 |  |  | $ | 315 |  |  | $ | 1,075 |  |  | $ | 1,006 |
Interest cost |  |  | 6,069 |  |  |  | 3,284 |  |  |  | 17,991 |  |  |  | 10,079 |
Expected return on assets |  |  | (6,900 | ) |  |  | (6,250 | ) |  |  | (20,468 | ) |  |  | (19,090 | )
Amortization of actuarial loss |  |  | 3,025 |  |  |  | 2,501 |  |  |  | 9,008 |  |  |  | 7,533 |
Net periodic cost (benefit) |  | $ | 2,556 |  |  | $ | (150 | ) |  | $ | 7,606 |  |  | $ | (472 | )
For the three months ended September 30, 2023 and 2022, the non-service components of net periodic pension expense (benefit) of $2,194,000 and $(465,000), respectively, are included in "Other (Loss) Income, net" on the unaudited Condensed Consolidated Statement of Operations. For the nine months ended September 30, 2023 and 2022, the non-service components of net periodic pension expense (benefit) of $6,531,000 and $(1,478,000), respectively, are included in "Other (Loss) Income, net" on the unaudited Condensed Consolidated Statement of Operations. For the nine months ended September 30, 2023, the Company made no contributions to the U.S. defined benefit pension plan and $1,795,000 to the U.K. defined benefit pension plans, as compared with no contributions to the U.S. defined benefit pension plan and $487,000 to the U.K. defined benefit pension plans during the nine months ended September 30, 2022, respectively.

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