Asset Retirement Obligations (Narrative) (Details) - USD ($) $ in Thousands |
6 Months Ended | 9 Months Ended | 12 Months Ended | |
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Jun. 30, 2020 |
Dec. 31, 2019 |
Sep. 30, 2020 |
Dec. 31, 2019 |
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| Asset Retirement Obligations [Abstract] | ||||
| Estimate of increase costs | $ 600 | |||
| Additions | $ 400 | $ 359 | $ 595 | |
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- Definition Asset Retirement Obligation, Estimate Of Increase Costs No definition available.
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- References No definition available.
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- Definition Amount of asset retirement obligations incurred during the period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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