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Pension and Postretirement Benefits (Amounts Recognized in Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | --- | ---
Postretirement Medical Benefits |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Unrecognized net gain (loss) | $ 130 | $ 55 |
Unrecognized prior service cost | (455) | (551) |
Accumulated other comprehensive loss, net of tax | (325) | (496) | $ (2,072)
United States | Pension Plan |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Unrecognized net gain (loss) | (61,904) | (43,725) |
Unrecognized prior service cost | (698) | (730) |
Accumulated other comprehensive loss, net of tax | (62,602) | (44,455) | (30,014)
Foreign Plan | Pension Plan |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Unrecognized net gain (loss) | (56,698) | (39,007) |
Unrecognized prior service cost | (3,270) | (3,414) |
Accumulated other comprehensive loss, net of tax | $ (59,968) | $ (42,421) | $ (70,581)

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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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