Supplemental oil, NGL and natural gas disclosures (unaudited) - Standardized measure of discounted future net cash flows (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Oil and Gas Exploration and Production Industries Disclosures [Abstract]
Future cash inflows	$ 16,343,468	$ 11,846,148	$ 3,824,104
Future production costs	(4,136,380)	(3,595,524)	(1,740,537)
Future development costs	(1,403,721)	(1,064,527)	(351,568)
Future income tax expenses	(1,587,677)	(774,461)	(20,076)
Future net cash flows	9,215,690	6,411,636	1,711,923
10% discount for estimated timing of cash flows	(4,461,114)	(2,986,324)	(697,069)
Standardized measure of discounted future net cash flows	$ 4,754,576	3,425,312	1,014,854	$ 1,662,261
Future net cash flow discount rate for impairment of oil and gas properties (as a percent)	10.00%
Non-cash full cost ceiling impairment	$ 0	$ 0	$ 889,453