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EMPLOYEE RETIREMENT PLANS - Schedule of net periodic pension cost (Details) | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022
Employee Retirement Plans |  |
Long-term rate of return on plan assets | 6.75% |
Defined Benefit Pension Plan |  |
Employee Retirement Plans |  |
Discount rate for projected benefit obligation | 5.41% | 2.83%
Discount rate for determining interest cost | 5.35% | 2.39%
Long-term rate of return on plan assets | 6.75% | 6.75%
Supplemental Pension Plan |  |
Employee Retirement Plans |  |
Discount rate for projected benefit obligation | 5.44% | 2.86%
Discount rate for determining interest cost | 5.37% | 2.54%

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- Definition Weighted average rate for present value of future retirement benefits cash flows, used to determine benefit obligation of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (k)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 + Details
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- Definition Weighted average rate of return on plan assets, reflecting average rate of earnings expected on existing plan assets and expected contributions, used to determine net periodic benefit cost of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-8 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (k)(3) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition The interest rate used to adjust for the time value of money relating to determining interest cost. + References No definition available. + Details
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