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Pension Plans (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021
Retirement Benefits [Abstract] |  |  |  |
Net service cost | $ (300) | $ (1,084) | $ (2,390) | $ (3,300)
Interest cost | (322) | (163) | (861) | (495)
Expected return on plan assets | 213 | 105 | 549 | 322
Amortization of actuarial gain | 95 | 0 | 95 | 0
Administrative charges | (87) | (71) | (227) | (214)
Net periodic pension cost | $ (401) | $ (1,213) | $ (2,834) | $ (3,687)

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