Commitments and Contingencies - Purchase Commitments (Details) gal in Thousands, bbl in Thousands, $ in Thousands	Dec. 31, 2021 USD ($) bbl gal
Crude oil
Purchase commitments for crude oil and natural gas
Fixed-price purchase commitments, due in remainder of fiscal year	$ 128,709
Fixed-price purchase commitments volume, due in remainder of fiscal year | bbl	1,818
Fixed-price purchase commitments, due in first year	$ 0
Fixed-price purchase commitments volume, due in first year | bbl	0
Fixed-price purchase commitments, due in second year	$ 0
Fixed-price purchase commitments volume, due in second year | bbl	0
Total fixed-price purchase commitments	$ 128,709
Total fixed-price purchase commitments volume | bbl	1,818
Index-price purchase commitments, due remainder of fiscal year	$ 1,146,503
Index-price purchase commitments volume, due in remainder of fiscal year | bbl	15,880
Index-price purchase commitments, due in first year	$ 2,506,678
Index-price purchase commitments volume, due in first year | bbl	37,234
Index-price purchase commitments, due in second year	$ 1,823,070
Index-price purchase commitments volume, due in second year | bbl	29,473
Index-price purchase commitments, due in third year	$ 1,345,043
Index-price purchase commitments volume, due in third year | bbl	22,775
Index-price purchase commitments, due in fourth year	$ 570,834
Index-price purchase commitments volume, due in fourth year | bbl	10,411
Total index-price purchase commitments	$ 7,392,128
Total index-price purchase commitments volume | bbl	115,773
Natural gas liquids
Purchase commitments for crude oil and natural gas
Fixed-price purchase commitments, due in remainder of fiscal year	$ 12,646
Fixed-price purchase commitments volume, due in remainder of fiscal year | gal	14,472
Fixed-price purchase commitments, due in first year	$ 6,278
Fixed-price purchase commitments volume, due in first year | gal	7,812
Fixed-price purchase commitments, due in second year	$ 4,588
Fixed-price purchase commitments volume, due in second year | gal	6,048
Total fixed-price purchase commitments	$ 23,512
Total fixed-price purchase commitments volume | gal	28,332
Index-price purchase commitments, due remainder of fiscal year	$ 437,705
Index-price purchase commitments volume, due in remainder of fiscal year | gal	367,994
Index-price purchase commitments, due in first year	$ 30,002
Index-price purchase commitments volume, due in first year | gal	30,206
Index-price purchase commitments, due in second year	$ 15,619
Index-price purchase commitments volume, due in second year | gal	25,200
Index-price purchase commitments, due in third year	$ 0
Index-price purchase commitments volume, due in third year | gal	0
Index-price purchase commitments, due in fourth year	$ 0
Index-price purchase commitments volume, due in fourth year | gal	0
Total index-price purchase commitments	$ 483,326
Total index-price purchase commitments volume | gal	423,400