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Pension And Other Liabilities (Summary Of Other Liabilities Including Pension) (Details) - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Aug. 29, 2014
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Pension And Other Liabilities [Abstract] |  |  |  |
Lease liability | $ 5,900 | $ 5,900 |  |
Accrued pension | 500 | 684 |  |
Security deposit payable | 117 | 74 |  |
Finance lease liabilities | 43 | 40 |  |
Other | 33 | 33 |  |
Other current liabilities | 6,593 | 6,731 |  |
Accrued pension | 2,312 | 2,646 |  | $ 7,500
Lease make-good provision | 5,908 | 6,050 | $ 6,131 |
Deferred rent liability | 3,786 | 1,314 |  |
Environmental reserve | 1,656 | 1,656 |  |
Acquired leases |  | 2 |  |
Finance lease liabilities |  | 43 |  |
Other non-current liabilities | $ 13,662 | $ 11,711 |  |

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- Definition Amount of liability, recognized in statement of financial position, for defined benefit pension plan, classified as current. Excludes other postretirement benefit plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(20)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480535/715-20-45-3 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480535/715-20-45-2 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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