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Pensions and Other Postretirement Benefit Plans (Schedule of Funded Status of Plans and Composition of Accrued Pension Cost) (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Sep. 30, 2022 | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | --- | --- | ---
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Funded status |  | $ 6,200 |  |
Noncurrent asset | $ 16,200 |  | $ 32,500 |
Pension plans |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Fair value of plan assets | 74,929 |  | 225,327 | $ 239,051
Benefit obligation | 83,730 |  | 230,790 | 245,800
Funded status | (8,801) |  | (5,463) |
Noncurrent asset | 16,234 |  | 32,504 |
Current liability | (1,974) |  | (7,116) |
Noncurrent liability | (23,061) |  | (30,851) |
Net amount recognized | (8,801) |  | (5,463) |
Net actuarial loss | 17,915 |  | 52,138 |
Prior service cost/(credit) | (134) |  | 256 |
Net amount recognized | 17,781 |  | 52,394 |
Other postretirement benefits |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Fair value of plan assets | 0 |  | 0 | 0
Benefit obligation | 35,658 |  | 44,884 | $ 47,977
Funded status | (35,658) |  | (44,884) |
Noncurrent asset | 0 |  | 0 |
Current liability | (3,660) |  | (3,627) |
Noncurrent liability | (31,998) |  | (41,257) |
Net amount recognized | (35,658) |  | (44,884) |
Net actuarial loss | 8,958 |  | 17,483 |
Prior service cost/(credit) | (4,574) |  | (8,458) |
Net amount recognized | $ 4,384 |  | $ 9,025 |

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- Definition Amount, before 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://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (j) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI https://asc.fasb.org/extlink&oid=126968391&loc=SL7669686-108580 + Details
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