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Property, Plant and Equipment (Schedule Of Property, Plant And Equipment) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Property, Plant and Equipment, Net [Abstract] |  |  |
Building and improvements | $ 18,774 | $ 18,562 |
Plant and equipment | 2,020,193 | 1,950,479 |
Other | 124,517 | 118,870 |
Property, plant and equipment, gross | 2,163,484 | 2,087,911 |
Less: Accumulated depreciation | (1,293,700) | (1,237,929) |
Property, plant and equipment, net, before construction in progress | 869,784 | 849,982 |
Construction in progress | 16,228 | 53,606 |
Property, plant and equipment, net | 886,012 | 903,588 |
Depreciation expense | $ 87,018 | $ 86,253 | $ 84,511

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- Definition Amount before accumulated depreciation of building structures held for productive use including addition, improvement, or renovation to the structure, including, but not limited to, interior masonry, interior flooring, electrical, and plumbing. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 360 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482099/360-10-50-1 + Details
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- Definition Amount of structure or a modification to a structure under construction. Includes recently completed structures or modifications to structures that have not been placed into service. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 360 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482099/360-10-50-1 + Details
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