Sale of Product Lines (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||||
|---|---|---|---|---|---|---|
Jun. 28, 2019 |
Sep. 30, 2020 |
Sep. 30, 2020 |
Sep. 30, 2019 |
Jul. 01, 2020 |
Dec. 31, 2019 |
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| Sale of Product Lines [Line Items] | ||||||
| Pre-tax gain on sale | $ 4,958 | $ 4,958 | $ 11,362 | |||
| Property, plant and equipment, net | $ 1,135,757 | $ 1,135,757 | $ 1,186,770 | |||
| Magnesium Silicate Product Line | Disposal group, disposed of by sale, not discontinued operations | ||||||
| Sale of Product Lines [Line Items] | ||||||
| Consideration for sale of product line | $ 18,000 | |||||
| Inventory, gross | 1,556 | |||||
| Deferred revenue | $ 11,486 | |||||
| Sulfate Salts Product Line | Disposal group, disposed of by sale, not discontinued operations | ||||||
| Sale of Product Lines [Line Items] | ||||||
| Consideration for sale of product line | $ 28,000 | |||||
| Pre-tax gain on sale | 11,362 | |||||
| Net working capital | 4,215 | |||||
| Property, plant and equipment, net | 3,423 | |||||
| Deferred revenue | $ 9,000 | |||||
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- Definition Disposal Group, Excluding Discontinued Operation, Consideration No definition available.
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- Definition Net Working Capital No definition available.
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- Definition Amount of deferred income and obligation to transfer product and service to customer for which consideration has been received or is receivable. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount before tax of gain (loss) recognized on the sale or disposal of a disposal group. Excludes discontinued operations. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition Gross amount, as of the balance sheet date, of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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