Dispositions	3 Months Ended
Mar. 31, 2021
Business Combinations [Abstract]
Dispositions	(4) DISPOSITIONS We recognized a pretax net loss of $1.9 million on the sale of assets in first quarter 2021 compared to a pretax net gain of $122.1 million in first quarter 2020. See discussion below for further details. 2021 Dispositions Other. In first quarter 2021, we recorded an additional loss on the sale of our North Louisiana assets of $1.9 million, which closed in third quarter 2020 which is related to final closing adjustments and the settlement of a royalty underpayment claim related to these assets. 2020 Dispositions Pennsylvania. In first quarter 2020, we completed the sale of our shallow legacy assets in northwestern Pennsylvania for proceeds of $1.0 million. Based upon the receipt of approval from state governmental authorities of a change in operatorship during first quarter, we recognized a pretax gain of $122.7 million primarily due to the elimination of the asset retirement obligation associated with these properties. Other. In first quarter 2020, we sold miscellaneous inventory and other assets for proceeds of $59,000 resulting in a pretax loss of $617,000.

The entire disclosure for business combinations, including leverage buyout transactions (as applicable), and divestitures. This may include a description of a business combination or divestiture (or series of individually immaterial business combinations or divestitures) completed during the period, including background, timing, and assets and liabilities recognized and reclassified or sold. This element does not include fixed asset sales and plant closings.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-URI http://asc.fasb.org/subtopic&trid=2122178

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-URI http://asc.fasb.org/topic&trid=2303972

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