[Line Items] for Asset Retirement Obligations Details [Table]

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- Definition

Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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- Definition

The carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees.

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- Definition

The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale).

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- Definition

Amount of loss from impairment of right-of-use asset from operating lease.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
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Fixed Assets, Mineral Leaseholds, and Asset Retirement Obligations (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Asset Retirement Obligations Details [Line Items]
Asset retirement obligation balance	$ 179,302		$ 179,302		$ 176,852
Impairment expense	0	$ 277,495	0	$ 277,495
Covid-19 \| Onshore Facilities and Transportation
Asset Retirement Obligations Details [Line Items]
Impairment expense		277,500
Impairment of net fixed assets		272,700
Impairment of right of use assets		$ 4,800
Accrued Liabilities
Asset Retirement Obligations Details [Line Items]
Asset retirement obligation balance	$ 12,300		$ 12,300		$ 14,700