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Intangibles (Net of Amortization) and Goodwill (Schedule Of Information Related To Intangible Assets and Goodwill (Details) - USD ($) $ in Thousands | Sep. 30, 2022 | Dec. 31, 2021
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Finite-Lived Intangible Assets [Line Items] |  |
Amortizing intangible assets, Accumulated Amortization | $ 10,877 | $ 9,810
Goodwill, Gross Carrying Amount | 123,560 | 123,922
Amortizing intangible assets and Goodwill, Gross Carrying Amount | 137,200 | 137,562
Formulas And Technology [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Amortizing intangible assets, Gross Carrying Amount | 6,200 | 6,200
Amortizing intangible assets, Accumulated Amortization | 5,425 | 4,650
Contracts [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Amortizing intangible assets, Gross Carrying Amount | 2,000 | 2,000
Amortizing intangible assets, Accumulated Amortization | 1,150 | 1,000
Customer Bases [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Amortizing intangible assets, Gross Carrying Amount | 5,440 | 5,440
Amortizing intangible assets, Accumulated Amortization | $ 4,302 | $ 4,160

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