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Divestitures	12 Months Ended
Divestitures	Dec. 31, 2019
Business Combinations [Abstract]
Divestitures	Divestitures The Company recognized an aggregate net loss on sale of assets of $1.5 million, $16.3 million and $11.6 million for the years ended December 31, 2019, 2018 and 2017, respectively. In July 2018, the Company sold certain proved and unproved oil and gas properties in the Haynesville Shale to a third party for $30.0 million. The sales price included a $5.0 million deposit that was received in the fourth quarter of 2017. The Company recognized a gain on sale of oil and gas properties of $29.7 million. In February 2018, the Company sold certain proved and unproved oil and gas properties in the Eagle Ford Shale to an affiliate of Venado Oil & Gas LLC for $765.0 million. The sales price included a $76.5 million deposit that was received in the fourth quarter of 2017. During the fourth quarter of 2017, the Company recorded an impairment charge of $414.3 million associated with the proposed sale of these properties and upon closing recognized a loss on sale of oil and gas properties of $45.4 million. In September 2017, the Company sold certain proved and unproved oil and gas properties and related pipeline assets located in West Virginia, Virginia and Ohio to an affiliate of Carbon Natural Gas Company for $41.3 million, and recognized an $11.9 million loss on sale of assets. During the second quarter of 2017, the Company recorded an impairment charge of $68.6 million associated with the proposed sale of these properties.