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Business and Basis of Presentation (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |  |  |
Idle mine costs | $ 9,327 | $ 0 | $ 20,203 | $ 0
Business interruption costs | $ 6,872 | $ 0 | $ 13,892 | $ 0

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- Definition Business Interruption + References No definition available. + Details
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- Definition Idle Mine Expense + References No definition available. + Details
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- References No definition available. + Details
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