Derivative Instruments - Commodity derivatives (Details)	Sep. 30, 2021 bbl / d MMBTU / d MMBTU $ / bbl $ / MMBTU
Put option | Year ending December 31, 2026
Derivative Instruments
Notional amount | MMBTU	94,544,000
Weighted average strike price | $ / MMBTU	2.57
Call Option
Derivative Instruments
Notional amount | MMBTU / d	427,500
Fixed price ($/MMBtu) | $ / MMBTU	2.77
Swaps | Natural gas | Henry Hub | October-December 2021
Derivative Instruments
Notional amount | MMBTU / d	2,160,000
Weighted average index price | $ / MMBTU	2.78
Swaps | Natural gas | Henry Hub | October-December 2021 | VIE, Martica
Derivative Instruments
Notional amount | MMBTU / d	46,384
Weighted average index price | $ / MMBTU	2.77
Swaps | Natural gas | Henry Hub | January-December 2022
Derivative Instruments
Notional amount | MMBTU / d	1,155,486
Weighted average index price | $ / MMBTU	2.50
Swaps | Natural gas | Henry Hub | January-December 2022 | VIE, Martica
Derivative Instruments
Notional amount | MMBTU / d	38,356
Weighted average index price | $ / MMBTU	2.39
Swaps | Natural gas | Henry Hub | January-December 2023
Derivative Instruments
Notional amount | MMBTU / d	43,000
Weighted average index price | $ / MMBTU	2.37
Swaps | Natural gas | Henry Hub | January-December 2023 | VIE, Martica
Derivative Instruments
Notional amount | MMBTU / d	35,616
Weighted average index price | $ / MMBTU	2.35
Swaps | Natural gas | Henry Hub | January-December 2024 | VIE, Martica
Derivative Instruments
Notional amount | MMBTU / d	23,885
Weighted average index price | $ / MMBTU	2.33
Swaps | Natural gas | Henry Hub | January-March 2025 | VIE, Martica
Derivative Instruments
Notional amount | MMBTU / d	18,021
Weighted average index price | $ / MMBTU	2.53
Swaps | Natural gas | NYMEX to TCO | October-December 2021
Derivative Instruments
Notional amount | MMBTU / d	40,000
Weighted average hedged differential | $ / MMBTU	0.414
Swaps | Natural gas | NYMEX to TCO | January-December 2022
Derivative Instruments
Notional amount | MMBTU / d	60,000
Weighted average hedged differential | $ / MMBTU	0.515
Swaps | Natural gas | NYMEX to TCO | January-December 2023
Derivative Instruments
Notional amount | MMBTU / d	50,000
Weighted average hedged differential | $ / MMBTU	0.525
Swaps | Natural gas | NYMEX to TCO | January-December 2024
Derivative Instruments
Notional amount | MMBTU / d	50,000
Weighted average hedged differential | $ / MMBTU	0.530
Swaps | Natural gas | Mont Belvieu Natural Gasoline-OPIS Non-TET | October-December 2021
Derivative Instruments
Notional amount	8,300
Weighted average index price | $ / bbl	49.70
Swaps | Natural gas | Mont Belvieu Natural Gasoline-OPIS Non-TET | October-December 2021 | VIE, Martica
Derivative Instruments
Notional amount	339
Weighted average index price | $ / bbl	35.24
Swaps | Natural gas | Mont Belvieu Natural Gasoline-OPIS Non-TET | January-December 2022 | VIE, Martica
Derivative Instruments
Notional amount	282
Weighted average index price | $ / bbl	34.37
Swaps | Natural gas | Mont Belvieu Natural Gasoline-OPIS Non-TET | January-December 2023 | VIE, Martica
Derivative Instruments
Notional amount	247
Weighted average index price | $ / bbl	40.74
Swaps | Natural gas liquids | Mont Belvieu Natural Gasoline to WTI | October-December 2021
Derivative Instruments
Notional amount	9,325
Weighted average payout ratio	77
Swaps | Ethane | Mont Belvieu Purity Ethane-OPIS | October-December 2021 | VIE, Martica
Derivative Instruments
Notional amount	990
Weighted average index price | $ / bbl	7.01
Swaps | Ethane | Mont Belvieu Purity Ethane-OPIS | January-March 2022 | VIE, Martica
Derivative Instruments
Notional amount	521
Weighted average index price | $ / bbl	6.68
Swaps | Propane | Mont Belvieu Propane OPIS Non TET | October-December 2021 | VIE, Martica
Derivative Instruments
Notional amount	1,069
Weighted average index price | $ / bbl	19.88
Swaps | Propane | Mont Belvieu Propane OPIS Non TET | January-December 2022 | VIE, Martica
Derivative Instruments
Notional amount	934
Weighted average index price | $ / bbl	19.20
Swaps | Butane | Mont Belvieu Butane OPIS Non TET | October-December 2021
Derivative Instruments
Notional amount	2,600
Weighted average index price | $ / bbl	33.77
Swaps | Butane | Mont Belvieu Butane OPIS TET | October-December 2021
Derivative Instruments
Notional amount	1,500
Weighted average index price | $ / bbl	32.24
Swaps | Isobutane | Mont Belvieu Isobutane-OPIS Non-TET | October-December 2021
Derivative Instruments
Notional amount	2,800
Weighted average index price | $ / bbl	35.75
Swaps | Oil | West Texas Intermediate | October-December 2021
Derivative Instruments
Notional amount	3,000
Weighted average index price | $ / bbl	55.16
Swaps | Oil | West Texas Intermediate | October-December 2021 | VIE, Martica
Derivative Instruments
Notional amount	111
Weighted average index price | $ / bbl	43.48
Swaps | Oil | West Texas Intermediate | January-December 2022 | VIE, Martica
Derivative Instruments
Notional amount	112
Weighted average index price | $ / bbl	44.25
Swaps | Oil | West Texas Intermediate | January-December 2023 | VIE, Martica
Derivative Instruments
Notional amount	99
Weighted average index price | $ / bbl	45.03
Swaps | Oil | West Texas Intermediate | January-December 2024 | VIE, Martica
Derivative Instruments
Notional amount	43
Weighted average index price | $ / bbl	44.02
Swaps | Oil | West Texas Intermediate | January-March 2025 | VIE, Martica
Derivative Instruments
Notional amount	39
Weighted average index price | $ / bbl	45.06