| Performance Materials Divestiture - Reconciliation of Loss (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended | |||
|---|---|---|---|---|
| Dec. 14, 2020 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | |
| Dispositions [Line Items] | ||||
| Net proceeds received from the sale of Performance Materials | $ 624,256 | $ 0 | $ 0 | |
| Transaction costs | (13,161) | |||
| Net assets derecognized | (681,973) | |||
| Loss on sale of Performance Materials | $ (70,878) | |||
| Dividends paid on common stock (in dollars per share) | $ 1.80 | $ 1.80 | ||
| Discontinued Operations | ||||
| Dispositions [Line Items] | ||||
| Purchase price | $ 650,000 | |||
| Net proceeds received from the sale of Performance Materials | 624,256 | |||
| Loss on sale of Performance Materials | $ 70,878 | $ 0 | $ 0 | |
| Dividends paid on common stock (in dollars per share) | $ 1.80 | |||
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- Definition Disposal Group, Including Discontinued Operation, Net Assets Derecognized On Disposal No definition available. 
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- Definition Disposal Group, Including Discontinued Operation, Transaction Costs For Disposal No definition available. 
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- Definition Aggregate dividends paid during the period for each share of common stock outstanding. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition Amount before tax of gain (loss) not previously recognized resulting from the disposal of a discontinued operation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation. No definition available. 
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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 This element represents the cash inflow during the period from the sale of a component of the entity. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Details 
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