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PENSION AND OTHER POST-RETIREMENT BENEFIT PLANS - SCHEDULE OF COMPONENTS OF NET PERIODIC BENEFIT COST (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Pension Benefits |  |  |
Amounts recognized in net periodic benefit cost |  |  |
Service cost | $ 14,991 | $ 17,500 | $ 21,361
Interest cost | 41,205 | 30,491 | 18,320
Expected return on plan assets | (48,978) | (47,637) | (49,091)
Amortization of prior service credit | (5,658) | (5,651) | (6,142)
Amortization of net (gain) loss | 19,846 | 16,060 | 20,556
Curtailment credit | 0 | 0 | 0
Settlement loss | 15,254 | 20,692 | 16,085
Total net periodic benefit cost | 36,660 | 31,455 | 21,089
Change in plan assets and benefit obligations recognized in AOCI, pre-tax |  |  |
Actuarial net (gain) loss | (32,720) | 22,609 | (80,047)
Prior service cost (credit) | 5,670 | 5,601 | 6,447
Total recognized in other comprehensive (income) loss, pre-tax | (27,050) | 28,210 | (73,600)
Net amounts recognized in periodic benefit cost and AOCI | 9,610 | 59,665 | (52,511)
Other Benefits |  |  |
Amounts recognized in net periodic benefit cost |  |  |
Service cost | 221 | 302 | 1,879
Interest cost | 7,171 | 4,603 | 3,857
Expected return on plan assets | 0 | 0 | 0
Amortization of prior service credit | (50) | 0 | 0
Amortization of net (gain) loss | (966) | (92) | 1,593
Curtailment credit | 740 | 0 | 0
Settlement loss | 926 | 0 | 0
Total net periodic benefit cost | 6,562 | 4,813 | 7,329
Change in plan assets and benefit obligations recognized in AOCI, pre-tax |  |  |
Actuarial net (gain) loss | 38,698 | (26,212) | (16,374)
Prior service cost (credit) | (736) | 0 | 0
Total recognized in other comprehensive (income) loss, pre-tax | 37,962 | (26,212) | (16,374)
Net amounts recognized in periodic benefit cost and AOCI | $ 44,524 | $ (21,399) | $ (9,045)

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