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Employee Benefits - Schedule of Amounts Recognized in Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
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Pension Benefits |  |
Amounts Recognized in Accumulated Other Comprehensive Income (Loss), Net of Tax |  |
Net Actuarial Gains (Losses) | $ (28,512) | $ (31,984)
Net Prior Service Credit | 0 | 0
Total Amounts Recognized in Accumulated Other Comprehensive Income (Loss), Net of Tax | (28,512) | (31,984)
Postretirement Benefits |  |
Amounts Recognized in Accumulated Other Comprehensive Income (Loss), Net of Tax |  |
Net Actuarial Gains (Losses) | 4,330 | 5,803
Net Prior Service Credit | 922 | 1,103
Total Amounts Recognized in Accumulated Other Comprehensive Income (Loss), Net of Tax | $ 5,252 | $ 6,906

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- Definition Amount, after tax, of accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan, that has not been recognized in net periodic benefit (cost) credit. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -Publisher FASB -URI https://asc.fasb.org//1943274/2147482790/220-10-45-14A Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (j) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 + Details
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- Definition Amount, after tax, of accumulated other comprehensive (income) loss for cost (credit) of benefit change attributable to participants' prior service from plan amendment or plan initiation of defined benefit plan, that has not been recognized in net periodic benefit cost (credit). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -Publisher FASB -URI https://asc.fasb.org//1943274/2147482790/220-10-45-14A Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (j) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 + Details
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