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Pension and Postretirement Benefits (Accumulated and Projected Obligations) (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Retirement Benefits [Abstract]
Benefit Obligation	$ 590,015	$ 529,531
Accumulated benefit obligation	577,942	519,287
Fair value of plan assets	$ 407,307	$ 401,285

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- Definition

Amount of accumulated benefit obligation for defined benefit plan with accumulated benefit obligation in excess of plan assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 715
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Amount of plan asset for defined benefit plan with accumulated benefit obligation in excess of plan assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 17
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-URI https://asc.fasb.org//1943274/2147480482/715-20-55-17

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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-URI https://asc.fasb.org//1943274/2147480506/715-20-50-3

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Amount of projected benefit obligation for defined benefit pension plan with accumulated benefit obligation in excess of plan assets.

+ References

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