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Savings Plans, Pension Plans and Other Postretirement Employee Benefits (Assets in Defined Benefit Pension Plan Invested) (Details) - Pension Plans [Member] - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | --- | ---
Fair Value of Plan Assets | $ 170,722 | $ 177,875 | $ 172,246
Cash and Cash Equivalents [Member] |  |  |
Fair Value of Plan Assets | 1,707 | 3,009 |
Collective Investment Funds [Member] |  |  |
Fair Value of Plan Assets | 169,015 |  |
Global Equities [Member] |  |  |
Fair Value of Plan Assets |  | 34,534 |
Fixed Income Securities [Member] |  |  |
Fair Value of Plan Assets |  | 131,837 |
Alternative Securities [Member] |  |  |
Fair Value of Plan Assets |  | 8,495 |
Level 1 |  |  |
Fair Value of Plan Assets | 1,707 | 160,262 |
Level 1 | Cash and Cash Equivalents [Member] |  |  |
Fair Value of Plan Assets | 1,707 | 3,009 |
Level 1 | Collective Investment Funds [Member] |  |  |
Fair Value of Plan Assets | 0 |  |
Level 1 | Global Equities [Member] |  |  |
Fair Value of Plan Assets |  | 34,534 |
Level 1 | Fixed Income Securities [Member] |  |  |
Fair Value of Plan Assets |  | 114,224 |
Level 1 | Alternative Securities [Member] |  |  |
Fair Value of Plan Assets |  | 8,495 |
Level 2 [Member] |  |  |
Fair Value of Plan Assets |  | 17,613 |
Level 2 [Member] | Cash and Cash Equivalents [Member] |  |  |
Fair Value of Plan Assets |  | 0 |
Level 2 [Member] | Global Equities [Member] |  |  |
Fair Value of Plan Assets |  | 0 |
Level 2 [Member] | Fixed Income Securities [Member] |  |  |
Fair Value of Plan Assets |  | 17,613 |
Level 2 [Member] | Alternative Securities [Member] |  |  |
Fair Value of Plan Assets |  | $ 0 |
Investments Measured at Net Asset Value [Member] |  |  |
Fair Value of Plan Assets | 169,015 |  |
Investments Measured at Net Asset Value [Member] | Cash and Cash Equivalents [Member] |  |  |
Fair Value of Plan Assets | 0 |  |
Investments Measured at Net Asset Value [Member] | Collective Investment Funds [Member] |  |  |
Fair Value of Plan Assets | $ 169,015 |  |

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- Definition Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee. + 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 50 -Paragraph 1 -Subparagraph (d)(iv)(02) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(ii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -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 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 6: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(ii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 7: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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