Annual report pursuant to Section 13 and 15(d)

Supplemental Information on Oil and Natural Gas Properties (Unaudited) - Standardized Measure of Discounted Future Cash Flows Relating to Proved Reserves Disclosure (Details)

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Supplemental Information on Oil and Natural Gas Properties (Unaudited) - Standardized Measure of Discounted Future Cash Flows Relating to Proved Reserves Disclosure (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Future Net Cash Flows Relating to Proved Oil and Gas Reserves, Net Cash Flows [Abstract]      
Future cash inflows $ 23,775,358 $ 12,458,033 $ 20,891,469
Future costs      
Production (8,038,362) (5,433,496) (6,717,088)
Development and net abandonment (1,927,789) (2,204,301) (3,058,861)
Future net inflows before income taxes 13,809,207 4,820,236 11,115,520
Future income taxes (1,481,005) (65,405) (941,768)
Future net cash flows 12,328,202 4,754,831 10,173,752
10% discount factor (6,077,447) (2,444,441) (5,222,726)
Standardized measure of discounted future net cash flows 6,250,755 2,310,390 4,951,026
Increase (Decrease) in Standardized Measure of Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves [Roll Forward]      
Standardized measure at the beginning of the period 2,310,390 4,951,026 2,941,293
Sales and transfers, net of production costs (1,466,413) (649,781) (579,744)
Net change in sales and transfer prices, net of production costs 4,336,078 (2,719,579) (387,970)
Net change due to purchases of in place reserves 797,327 0 2,975,296
Net change due to sales of in place reserves (105,376) (202,928) (303,526)
Extensions, discoveries, and improved recovery, net of future production and development costs incurred 583,976 250,759 607,146
Changes in future development cost (81,480) 361,008 205,398
Previously estimated development costs incurred 209,078 318,470 134,037
Revisions of quantity estimates (104,572) (671,800) (420,488)
Accretion of discount 234,495 536,958 314,921
Net change in income taxes (765,956) 383,999 (210,641)
Changes in production rates, timing and other 303,208 (247,742) (324,696)
Aggregate change 3,940,365 (2,640,636) 2,009,733
Standardized measure at the end of period $ 6,250,755 $ 2,310,390 $ 4,951,026