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Consolidated Statement of Cash Flow (Schedule of Non-cash Transactions Related to the Consolidated Statement of Cash Flow) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Disclosure Of Consolidated Statement Of Cash Flow [Abstract] |  |  |
(Decrease) Increase in asset retirement obligation | $ (651) | $ (1,812) | $ 13,299
(Decrease) Increase in provisions for other long-term liabilities | $ (443) | $ (1,051) | 1,867
Purchase of property, plant and equipment |  |  | $ (733)

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- Definition The increase during the reporting period in the carrying amount of asset retirement obligations. + References No definition available. + Details
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- Definition The increase in provision for other long-term liabilities. + References No definition available. + Details
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- Definition The amount of non-cash additions to property, plant and equipment. + References No definition available. + Details
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