Revenue from Contracts with Customers - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Disaggregation of Revenue
Total revenues from contracts with customers	$ 1,077,904	$ 498,772	$ 2,208,855	$ 1,213,973
(Loss) gain on derivatives not designated as hedges	(1,345,532)	26,426	(1,534,345)	415,862
Total operating revenues	(260,116)	527,074	689,807	1,634,131
Natural gas sales
Disaggregation of Revenue
Total revenues from contracts with customers	953,385	468,216	1,966,465	1,141,446
NGLs sales
Disaggregation of Revenue
Total revenues from contracts with customers	102,361	28,761	202,618	64,517
Oil sales
Disaggregation of Revenue
Total revenues from contracts with customers	22,158	1,795	39,772	8,010
Net marketing services and other
Disaggregation of Revenue
Net marketing services and other	$ 7,512	$ 1,876	$ 15,297	$ 4,296