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EMPLOYEE BENEFIT PLANS - Schedule of Net Periodic Benefit Cost (Details) - USD ($) $ in Thousands | 9 Months Ended
--- | ---
Sep. 30, 2025 | Sep. 30, 2024
Postretirement Medical Plans |  |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract] |  |
Service cost | $ 87 | $ 84
Interest cost | 53 | 41
Amortization of gain (loss) | (7) | (7)
Net periodic benefit cost | 133 | 118
Defined Benefit Pension Plans | Chemogas Defined Pension Plan |  |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract] |  |
Service cost | 161 | 58
Interest cost | 61 | 43
Amortization of gain (loss) | 3 | 0
Expected return on plan assets | (45) | (32)
Net periodic benefit cost | $ 180 | $ 69

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- Definition Amount of expected return (loss) recognized in net periodic benefit (cost) credit, calculated based on expected long-term rate of return and market-related value of plan assets of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 17 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480482/715-20-55-17 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 3A -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480535/715-20-45-3A Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 18 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480482/715-20-55-18 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (h)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (a)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-6 + Details
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