Revenue from Contract with Customer [Text Block] | Revenues Below is a discussion of the nature, timing, and presentation of revenues arising from the Company's major revenue-generating arrangements. Operated crude oil revenues – The Company pays third parties to transport the majority of its operated crude oil production from lease locations to downstream market centers, at which time the Company's customers take title and custody of the product in exchange for prices based on the particular market where the product was delivered. Operated crude oil revenues are recognized during the month in which control transfers to the customer and it is probable the Company will collect the consideration it is entitled to receive. Crude oil sales proceeds from operated properties are generally received by the Company within one month after the month in which a sale has occurred. Operated crude oil revenues are presented separately from transportation expenses as the Company controls the operated production prior to its transfer to customers. Transportation expenses associated with the Company's operated crude oil production totaled $45.2 million and $46.9 million for the three months ended September 30, 2021 and 2020, respectively, and $129.2 million and $120.8 million for the nine months ended September 30, 2021 and 2020, respectively. Operated natural gas revenues – The Company sells the majority of its operated natural gas production to midstream customers at its lease locations based on market prices in the field where the sales occur. Under these arrangements, the midstream customers obtain control of the unprocessed gas stream at the lease location and the Company's revenues from each sale are determined using contractually agreed pricing formulas which contain multiple components, including the volume and Btu content of the natural gas sold, the midstream customer's proceeds from the sale of residue gas and natural gas liquids ("NGLs") at secondary downstream markets, and contractual pricing adjustments reflecting the midstream customer's estimated recoupment of its investment over time. Such revenues are recognized net of pricing adjustments applied by the midstream customer during the month in which control transfers to the customer at the delivery point and it is probable the Company will collect the consideration it is entitled to receive. Natural gas sales proceeds from operated properties are generally received by the Company within one month after the month in which a sale has occurred. Under certain arrangements, in periods of significantly depressed prices for natural gas and NGLs the contractual pricing adjustments applied by the midstream customer in a particular month may exceed the consideration to be received by the Company under the arrangement, resulting in a net payment owed by the Company to the midstream customer. In these situations, the net amounts paid or payable by the Company are reflected as a reduction of natural gas sales in the caption "Crude oil and natural gas sales" in the unaudited condensed consolidated statements of operations. Such payments for operated properties, which are referred to herein as negative gas revenues, were immaterial for the three and nine months ended September 30, 2021 and totaled $2.5 million and $25.2 million for the three and nine months ended September 30, 2020, respectively. Under certain arrangements, the Company has the right to take a volume of processed residue gas and/or NGLs in-kind at the tailgate of the midstream customer's processing plant in lieu of a monetary settlement for the sale of the Company's operated natural gas production. The Company currently takes certain processed residue gas volumes in kind in lieu of monetary settlement, but does not currently take NGL volumes. When the Company elects to take volumes in kind, it pays third parties to transport the processed products it took in-kind to downstream delivery points, where it then sells to customers at prices applicable to those downstream markets. In such situations, operated revenues are recognized during the month in which control transfers to the customer at the delivery point and it is probable the Company will collect the consideration it is entitled to receive. Operated sales proceeds are generally received by the Company within one month after the month in which a sale has occurred. In these scenarios, the Company's revenues include the pricing adjustments applied by the midstream processing entity according to the applicable contractual pricing formula, but exclude the transportation expenses the Company incurs to transport the processed products to downstream customers. Transportation expenses associated with these arrangements totaled $8.7 million and $8.4 million for the three months ended September 30, 2021 and 2020, respectively, and $27.5 million and $27.3 million for the nine months ended September 30, 2021 and 2020, respectively. Non-operated crude oil and natural gas revenues – The Company's proportionate share of production from non-operated properties is generally marketed at the discretion of the operators. For non-operated properties, the Company receives a net payment from the operator representing its proportionate share of sales proceeds which is net of costs incurred by the operator, if any. Such non-operated revenues are recognized at the net amount of proceeds to be received by the Company during the month in which production occurs and it is probable the Company will collect the consideration it is entitled to receive. Proceeds are generally received by the Company within two to three months after the month in which production occurs. In periods of significantly depressed prices for natural gas and NGLs the costs incurred by the outside operator in a particular month may exceed the consideration to be received by the Company, resulting in a net payment owed by the Company to the outside operator. In these situations, the net amounts paid or payable by the Company are reflected as a reduction of natural gas sales in the caption "Crude oil and natural gas sales" in the unaudited condensed consolidated statements of operations. Such negative gas revenues associated with non-operated properties were immaterial for the three and nine months ended September 30, 2021 and totaled $4.7 million and $12.5 million for the three and nine months ended September 30, 2020, respectively. Revenues from derivative instruments – See Note 5. Derivative Instruments for discussion of the Company's accounting for its derivative instruments. Revenues from service operations – Revenues from the Company's crude oil and natural gas service operations consist primarily of revenues associated with water gathering, recycling, and disposal activities and the treatment and sale of crude oil reclaimed from waste products. Revenues associated with such activities, which are derived using market-based rates or rates commensurate with industry guidelines, are recognized during the month in which services are performed, the Company has an unconditional right to receive payment, and collectability is probable. Payment is generally received by the Company within one month after the month in which services are provided. Disaggregation of crude oil and natural gas revenues The following tables present the disaggregation of the Company's crude oil and natural gas revenues for the three and nine months ended September 30, 2021 and 2020. Three months ended September 30, 2021 Three months ended September 30, 2020 In thousands North Region South Region Total North Region South Region Total Crude oil revenues: Operated properties $ 615,514 $ 214,348 $ 829,862 $ 346,580 $ 176,585 $ 523,165 Non-operated properties 159,981 12,980 172,961 91,067 9,723 100,790 Total crude oil revenues 775,495 227,328 1,002,823 437,647 186,308 623,955 Natural gas revenues: Operated properties (1) 123,907 277,124 401,031 2,950 67,986 70,936 Non-operated properties (2) 31,132 21,195 52,327 (2,499) 9,076 6,577 Total natural gas revenues 155,039 298,319 453,358 451 77,062 77,513 Crude oil and natural gas sales $ 930,534 $ 525,647 $ 1,456,181 $ 438,098 $ 263,370 $ 701,468 Timing of revenue recognition Goods transferred at a point in time $ 930,534 $ 525,647 $ 1,456,181 $ 438,098 $ 263,370 $ 701,468 Goods transferred over time — — — — — — $ 930,534 $ 525,647 $ 1,456,181 $ 438,098 $ 263,370 $ 701,468 Nine months ended September 30, 2021 Nine months ended September 30, 2020 In thousands North Region South Region Total North Region South Region Total Crude oil revenues: Operated properties $ 1,647,079 $ 591,225 $ 2,238,304 $ 891,920 $ 385,836 $ 1,277,756 Non-operated properties 478,589 41,966 520,555 252,374 26,315 278,689 Total crude oil revenues 2,125,668 633,191 2,758,859 1,144,294 412,151 1,556,445 Natural gas revenues: Operated properties (1) 280,416 828,409 1,108,825 (7,974) 179,996 172,022 Non-operated properties (2) 64,876 54,068 118,944 (5,402) 15,798 10,396 Total natural gas revenues 345,292 882,477 1,227,769 (13,376) 195,794 182,418 Crude oil and natural gas sales $ 2,470,960 $ 1,515,668 $ 3,986,628 $ 1,130,918 $ 607,945 $ 1,738,863 Timing of revenue recognition Goods transferred at a point in time $ 2,470,960 $ 1,515,668 $ 3,986,628 $ 1,130,918 $ 607,945 $ 1,738,863 Goods transferred over time — — — — — — $ 2,470,960 $ 1,515,668 $ 3,986,628 $ 1,130,918 $ 607,945 $ 1,738,863 (1) Operated natural gas revenues for the North region include negative gas revenues totaling $2.5 million and $25.2 million for the three and nine month periods ended September 30, 2020, respectively. (2) Non-operated natural gas revenues for the North region include negative gas revenues totaling $4.7 million and $12.5 million for the three and nine month periods ended September 30, 2020, respectively. Performance obligations The Company satisfies the performance obligations under its crude oil and natural gas sales contracts upon delivery of its production and related transfer of control to customers. Judgment may be required in determining the point in time when control transfers to customers. Upon delivery of production, the Company has a right to receive consideration from its customers in amounts determined by the sales contracts. All of the Company's outstanding crude oil sales contracts at September 30, 2021 are short-term in nature with contract terms of less than one year. For such contracts, the Company has utilized the practical expedient in Accounting Standards Codification ("ASC") 606-10-50-14 exempting the Company from disclosure of the transaction price allocated to remaining performance obligations, if any, if the performance obligation is part of a contract that has an original expected duration of one year or less. The majority of the Company's operated natural gas production is sold at lease locations to midstream customers under multi-year term contracts. For such contracts having a term greater than one year, the Company has utilized the practical expedient in ASC 606-10-50-14A which indicates an entity is not required to disclose the transaction price allocated to remaining performance obligations, if any, if variable consideration is allocated entirely to a wholly unsatisfied performance obligation. Under the Company's sales contracts, whether for crude oil or natural gas, each unit of production delivered to a customer represents a separate performance obligation; therefore, future volumes to be delivered are wholly unsatisfied at period-end and disclosure of the transaction price allocated to remaining performance obligations is not applicable. Contract balances Under the Company’s crude oil and natural gas sales contracts or activities that give rise to service revenues, the Company recognizes revenue after its performance obligations have been satisfied, at which point the Company has an unconditional right to receive payment. Accordingly, the Company’s commodity sales contracts and service activities generally do not give rise to contract assets or contract liabilities under ASC Topic 606. Instead, the Company's unconditional rights to receive consideration are presented as a receivable within "Receivables – Crude oil and natural gas sales" or "Receivables – Joint interest and other", as applicable, in its condensed consolidated balance sheets. Revenues from previously satisfied performance obligations To record revenues for commodity sales, at the end of each month the Company estimates the amount of production delivered and sold to customers and the prices to be received for such sales. Differences between estimated revenues and actual amounts received for all prior months are recorded in the month payment is received from the customer and are reflected in the financial statements within the caption "Crude oil and natural gas sales". Revenues recognized during the three and nine months ended September 30, 2021 and 2020 related to performance obligations satisfied in prior reporting periods were not material. |