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Goodwill and Intangibles - Carrying Amount of Goodwill (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2020
Goodwill
Goodwill - beginning of period	$ 575,461	$ 575,461
Impairment of goodwill		(575,461)
Gathering And Processing
Goodwill
Goodwill - beginning of period	575,461	575,461
Impairment of goodwill	$ (575,000)	$ (575,461)

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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