Commitments and Contingencies - Sale Commitments (Details) gal in Thousands, bbl in Thousands, $ in Thousands	Mar. 31, 2022 USD ($) gal bbl	Mar. 31, 2021 USD ($)
Sales commitments for crude oil and natural gas
Net commodity asset (liability)	$ 51,203	$ 15,704
Crude oil | Fixed-Price
Sales commitments for crude oil and natural gas
Sales commitments, year one	187,058
Sales commitments, year two	0
Sales commitments, year three	0
Sales commitments	$ 187,058
Sales commitments, volume, year one | bbl	1,839
Sales commitments, volume, year two | bbl	0
Sales commitments, volume, year three | bbl	0
Total sales commitments, volume | bbl	1,839
Crude oil | Index-Price
Sales commitments for crude oil and natural gas
Sales commitments, year one	$ 3,093,185
Sales commitments, year two	837,815
Sales commitments, year three	777,060
Sales commitments, year four	28,698
Sales commitments	$ 4,736,758
Sales commitments, volume, year one | bbl	32,502
Sales commitments, volume, year two | bbl	10,248
Sales commitments, volume, year three | bbl	10,220
Sales commitments, volume, year four | bbl	390
Total sales commitments, volume | bbl	53,360
Natural Gas Liquids | Fixed-Price
Sales commitments for crude oil and natural gas
Sales commitments, year one	$ 53,795
Sales commitments, year two	7,844
Sales commitments, year three	46
Sales commitments	$ 61,685
Sales commitments, volume, year one | gal	46,853
Sales commitments, volume, year two | gal	9,692
Sales commitments, volume, year three | gal	50
Total sales commitments, volume | gal	56,595
Natural Gas Liquids | Index-Price
Sales commitments for crude oil and natural gas
Sales commitments, year one	$ 720,695
Sales commitments, year two	1,074
Sales commitments, year three	0
Sales commitments, year four	0
Sales commitments	$ 721,769
Sales commitments, volume, year one | gal	420,793
Sales commitments, volume, year two | gal	842
Sales commitments, volume, year three | gal	0
Sales commitments, volume, year four | gal	0
Total sales commitments, volume | gal	421,635
Prepaid expenses and other current assets
Sales commitments for crude oil and natural gas
Net commodity asset (liability)	$ 52,000
Accrued expenses and other payables
Sales commitments for crude oil and natural gas
Net commodity asset (liability)	$ 23,000