Derivative Instruments - Outstanding Commodity Derivatives (Details)	1 Months Ended	9 Months Ended
	Nov. 03, 2021 MMBTU $ / MMBTU $ / MBbls $ / MMBbls MBbls	Sep. 30, 2021 MMBTU $ / MMBTU
Natural gas (NYMEX)
Derivative [Line Items]
Volume (in Mmbtu) | MMBTU		4,600,000
Swaps Weighted-Average (in dollars per Mmbtu)		2.74
Natural gas (NYMEX)
Derivative [Line Items]
Volume (in Mmbtu) | MMBTU		41,400,000
Floor, Weighted-Average (in usd per Mmbtu)		2.68
Ceiling, Weighted-Average (in dollars per Mmbtu)		3.10
Natural gas (NYMEX) | Minimum
Derivative [Line Items]
Floor Price (in dollars per Mmbtu)		2.50
Ceiling, Cap Price (in dollars per Mmbtu)		2.89
Natural gas (NYMEX) | Maximum
Derivative [Line Items]
Floor Price (in dollars per Mmbtu)		2.85
Ceiling, Cap Price (in dollars per Mmbtu)		3.80
Natural gas (NYMEX)
Derivative [Line Items]
Volume (in Mmbtu) | MMBTU		9,200,000
Swaps Weighted-Average (in dollars per Mmbtu)		4.01
Natural gas (NYMEX)
Derivative [Line Items]
Volume (in Mmbtu) | MMBTU		9,150,000
Swaps Weighted-Average (in dollars per Mmbtu)		4.02
Natural gas (NYMEX)
Derivative [Line Items]
Volume (in Mmbtu) | MMBTU		1,550,000
Floor Price (in dollars per Mmbtu)		0
Floor, Weighted-Average (in usd per Mmbtu)		2.50
Ceiling, Cap Price (in dollars per Mmbtu)		0
Ceiling, Weighted-Average (in dollars per Mmbtu)		2.80
Natural gas (NYMEX)
Derivative [Line Items]
Volume (in Mmbtu) | MMBTU		3,100,000
Swaps Weighted-Average (in dollars per Mmbtu)		2.78
Natural gas (NYMEX)
Derivative [Line Items]
Volume (in Mmbtu) | MMBTU		36,000,000
Floor, Weighted-Average (in usd per Mmbtu)		4.38
Ceiling, Weighted-Average (in dollars per Mmbtu)		6.97
Natural gas (NYMEX) | Minimum
Derivative [Line Items]
Floor Price (in dollars per Mmbtu)		4.00
Ceiling, Cap Price (in dollars per Mmbtu)		5.00
Natural gas (NYMEX) | Maximum
Derivative [Line Items]
Floor Price (in dollars per Mmbtu)		4.75
Ceiling, Cap Price (in dollars per Mmbtu)		10.32
Natural gas (NYMEX)
Derivative [Line Items]
Volume (in Mmbtu) | MMBTU		42,800,000
Floor, Weighted-Average (in usd per Mmbtu)		3.19
Ceiling, Weighted-Average (in dollars per Mmbtu)		4.30
Natural gas (NYMEX) | Minimum
Derivative [Line Items]
Floor Price (in dollars per Mmbtu)		3.00
Ceiling, Cap Price (in dollars per Mmbtu)		4.07
Natural gas (NYMEX) | Maximum
Derivative [Line Items]
Floor Price (in dollars per Mmbtu)		3.50
Ceiling, Cap Price (in dollars per Mmbtu)		4.83
Natural gas (Perm EP) | Subsequent event
Derivative [Line Items]
Volume (in Mmbtu) | MMBTU	2,760,000
Floor, Weighted-Average (in usd per Mmbtu)	1.51
Ceiling, Cap Price (in dollars per Mmbtu)	0
Ceiling, Weighted-Average (in dollars per Mmbtu)	1.80
Natural gas (Perm EP) | Minimum | Subsequent event
Derivative [Line Items]
Floor Price (in dollars per Mmbtu)	1.50
Natural gas (Perm EP) | Maximum | Subsequent event
Derivative [Line Items]
Floor Price (in dollars per Mmbtu)	1.52
Natural gas (Perm EP) | Subsequent event
Derivative [Line Items]
Volume (in Mmbtu) | MMBTU	3,640,000
Floor, Weighted-Average (in usd per Mmbtu)	1.85
Ceiling, Weighted-Average (in dollars per Mmbtu)	2.18
Natural gas (Perm EP) | Minimum | Subsequent event
Derivative [Line Items]
Floor Price (in dollars per Mmbtu)	1.80
Ceiling, Cap Price (in dollars per Mmbtu)	2.18
Natural gas (Perm EP) | Maximum | Subsequent event
Derivative [Line Items]
Floor Price (in dollars per Mmbtu)	1.90
Ceiling, Cap Price (in dollars per Mmbtu)	2.19
Natural gas (Perm EP) | Subsequent event
Derivative [Line Items]
Volume (in Mmbtu) | MMBTU	5,460,000
Floor Price (in dollars per Mmbtu)	0
Floor, Weighted-Average (in usd per Mmbtu)	2.40
Ceiling, Weighted-Average (in dollars per Mmbtu)	2.88
Natural gas (Perm EP) | Minimum | Subsequent event
Derivative [Line Items]
Ceiling, Cap Price (in dollars per Mmbtu)	2.85
Natural gas (Perm EP) | Maximum | Subsequent event
Derivative [Line Items]
Ceiling, Cap Price (in dollars per Mmbtu)	2.90
Natural gas (Perm EP) | Subsequent event
Derivative [Line Items]
Volume (in Mmbtu) | MMBTU	7,300,000
Floor Price (in dollars per Mmbtu)	0
Floor, Weighted-Average (in usd per Mmbtu)	2.50
Ceiling, Cap Price (in dollars per Mmbtu)	0
Ceiling, Weighted-Average (in dollars per Mmbtu)	3.15
Natural gas (PEPL) | Subsequent event
Derivative [Line Items]
Volume (in Mmbtu) | MMBTU	2,760,000
Floor, Weighted-Average (in usd per Mmbtu)	1.73
Ceiling, Weighted-Average (in dollars per Mmbtu)	2.14
Natural gas (PEPL) | Minimum | Subsequent event
Derivative [Line Items]
Floor Price (in dollars per Mmbtu)	1.70
Ceiling, Cap Price (in dollars per Mmbtu)	2.12
Natural gas (PEPL) | Maximum | Subsequent event
Derivative [Line Items]
Floor Price (in dollars per Mmbtu)	1.78
Ceiling, Cap Price (in dollars per Mmbtu)	2.18
Natural gas (PEPL) | Subsequent event
Derivative [Line Items]
Volume (in Mmbtu) | MMBTU	7,280,000
Floor, Weighted-Average (in usd per Mmbtu)	2.00
Ceiling, Weighted-Average (in dollars per Mmbtu)	2.40
Natural gas (PEPL) | Minimum | Subsequent event
Derivative [Line Items]
Floor Price (in dollars per Mmbtu)	1.90
Ceiling, Cap Price (in dollars per Mmbtu)	2.35
Natural gas (PEPL) | Maximum | Subsequent event
Derivative [Line Items]
Floor Price (in dollars per Mmbtu)	2.10
Ceiling, Cap Price (in dollars per Mmbtu)	2.44
Natural gas (PEPL) | Subsequent event
Derivative [Line Items]
Volume (in Mmbtu) | MMBTU	5,460,000
Floor Price (in dollars per Mmbtu)	0
Floor, Weighted-Average (in usd per Mmbtu)	2.40
Ceiling, Weighted-Average (in dollars per Mmbtu)	2.86
Natural gas (PEPL) | Minimum | Subsequent event
Derivative [Line Items]
Ceiling, Cap Price (in dollars per Mmbtu)	2.81
Natural gas (PEPL) | Maximum | Subsequent event
Derivative [Line Items]
Ceiling, Cap Price (in dollars per Mmbtu)	2.91
Natural gas (PEPL) | Subsequent event
Derivative [Line Items]
Volume (in Mmbtu) | MMBTU	7,300,000
Floor Price (in dollars per Mmbtu)	0
Floor, Weighted-Average (in usd per Mmbtu)	2.60
Ceiling, Cap Price (in dollars per Mmbtu)	0
Ceiling, Weighted-Average (in dollars per Mmbtu)	3.27
Natural gas (Waha) | Subsequent event
Derivative [Line Items]
Volume (in Mmbtu) | MMBTU	2,760,000
Floor Price (in dollars per Mmbtu)	0
Floor, Weighted-Average (in usd per Mmbtu)	1.50
Ceiling, Weighted-Average (in dollars per Mmbtu)	1.75
Natural gas (Waha) | Minimum | Subsequent event
Derivative [Line Items]
Ceiling, Cap Price (in dollars per Mmbtu)	1.75
Natural gas (Waha) | Maximum | Subsequent event
Derivative [Line Items]
Ceiling, Cap Price (in dollars per Mmbtu)	1.76
Natural gas (Waha) | Subsequent event
Derivative [Line Items]
Volume (in Mmbtu) | MMBTU	7,280,000
Floor, Weighted-Average (in usd per Mmbtu)	1.77
Ceiling, Weighted-Average (in dollars per Mmbtu)	2.15
Natural gas (Waha) | Minimum | Subsequent event
Derivative [Line Items]
Floor Price (in dollars per Mmbtu) | $ / MMBbls	1.70
Ceiling, Cap Price (in dollars per Mmbtu)	2.10
Natural gas (Waha) | Maximum | Subsequent event
Derivative [Line Items]
Floor Price (in dollars per Mmbtu) | $ / MMBbls	1.84
Ceiling, Cap Price (in dollars per Mmbtu)	2.20
Natural gas (Waha) | Subsequent event
Derivative [Line Items]
Volume (in Mmbtu) | MMBTU	5,460,000
Floor Price (in dollars per Mmbtu)	0
Floor, Weighted-Average (in usd per Mmbtu)	2.40
Ceiling, Weighted-Average (in dollars per Mmbtu)	2.86
Natural gas (Waha) | Minimum | Subsequent event
Derivative [Line Items]
Ceiling, Cap Price (in dollars per Mmbtu)	2.82
Natural gas (Waha) | Maximum | Subsequent event
Derivative [Line Items]
Ceiling, Cap Price (in dollars per Mmbtu)	2.89
Natural gas (Waha) | Subsequent event
Derivative [Line Items]
Volume (in Mmbtu) | MMBTU	3,650,000
Floor Price (in dollars per Mmbtu)	0
Floor, Weighted-Average (in usd per Mmbtu)	2.40
Ceiling, Cap Price (in dollars per Mmbtu)	0
Ceiling, Weighted-Average (in dollars per Mmbtu)	2.77
Natural gas (Waha) | Subsequent event
Derivative [Line Items]
Volume (in Mmbtu) | MMBTU	7,300,000
Floor Price (in dollars per Mmbtu)	0
Floor, Weighted-Average (in usd per Mmbtu)	2.50
Ceiling, Cap Price (in dollars per Mmbtu)	0
Ceiling, Weighted-Average (in dollars per Mmbtu)	3.12
Crude oil (WTI) | Subsequent event
Derivative [Line Items]
Floor, Weighted-Average (in usd per Mmbtu) | $ / MBbls	29.71
Ceiling, Weighted-Average (in dollars per Mmbtu) | $ / MBbls	36.86
Derivative, Nonmonetary Notional Amount, Volume | MBbls	1,288
Crude oil (WTI) | Minimum | Subsequent event
Derivative [Line Items]
Floor Price (in dollars per Mmbtu) | $ / MBbls	29.00
Ceiling, Cap Price (in dollars per Mmbtu) | $ / MBbls	34.15
Crude oil (WTI) | Maximum | Subsequent event
Derivative [Line Items]
Floor Price (in dollars per Mmbtu) | $ / MBbls	30.00
Ceiling, Cap Price (in dollars per Mmbtu) | $ / MBbls	40.55
Crude oil (WTI) | Subsequent event
Derivative [Line Items]
Floor Price (in dollars per Mmbtu) | $ / MBbls	0
Floor, Weighted-Average (in usd per Mmbtu) | $ / MBbls	35.00
Ceiling, Weighted-Average (in dollars per Mmbtu) | $ / MBbls	45.28
Derivative, Nonmonetary Notional Amount, Volume | MBbls	1,274
Crude oil (WTI) | Minimum | Subsequent event
Derivative [Line Items]
Ceiling, Cap Price (in dollars per Mmbtu) | $ / MBbls	45.15
Crude oil (WTI) | Maximum | Subsequent event
Derivative [Line Items]
Ceiling, Cap Price (in dollars per Mmbtu) | $ / MBbls	45.40
Crude oil (WTI) | Subsequent event
Derivative [Line Items]
Floor, Weighted-Average (in usd per Mmbtu) | $ / MBbls	36.11
Ceiling, Weighted-Average (in dollars per Mmbtu) | $ / MBbls	49.97
Derivative, Nonmonetary Notional Amount, Volume | MBbls	2,457
Crude oil (WTI) | Minimum | Subsequent event
Derivative [Line Items]
Floor Price (in dollars per Mmbtu) | $ / MBbls	35.00
Ceiling, Cap Price (in dollars per Mmbtu) | $ / MBbls	48.38
Crude oil (WTI) | Maximum | Subsequent event
Derivative [Line Items]
Floor Price (in dollars per Mmbtu) | $ / MBbls	37.50
Ceiling, Cap Price (in dollars per Mmbtu) | $ / MBbls	51.10
Crude oil (WTI) | Subsequent event
Derivative [Line Items]
Floor Price (in dollars per Mmbtu) | $ / MBbls	0
Floor, Weighted-Average (in usd per Mmbtu) | $ / MBbls	40.00
Ceiling, Weighted-Average (in dollars per Mmbtu) | $ / MBbls	49.19
Derivative, Nonmonetary Notional Amount, Volume | MBbls	3,650
Crude oil (WTI) | Minimum | Subsequent event
Derivative [Line Items]
Ceiling, Cap Price (in dollars per Mmbtu) | $ / MBbls	47.55
Crude oil (WTI) | Maximum | Subsequent event
Derivative [Line Items]
Ceiling, Cap Price (in dollars per Mmbtu) | $ / MBbls	50.89
Crude oil (WTI) | Subsequent event
Derivative [Line Items]
Floor Price (in dollars per Mmbtu) | $ / MBbls	0
Floor, Weighted-Average (in usd per Mmbtu) | $ / MBbls	57.00
Ceiling, Weighted-Average (in dollars per Mmbtu) | $ / MBbls	72.43
Derivative, Nonmonetary Notional Amount, Volume | MBbls	2,920
Crude oil (WTI) | Minimum | Subsequent event
Derivative [Line Items]
Ceiling, Cap Price (in dollars per Mmbtu) | $ / MBbls	72.20
Crude oil (WTI) | Maximum | Subsequent event
Derivative [Line Items]
Ceiling, Cap Price (in dollars per Mmbtu) | $ / MBbls	72.80
Crude oil (WTI Midland) | Subsequent event
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount, Volume | MBbls	1,196
Crude oil (WTI Midland) | Basis Swaps | Subsequent event
Derivative [Line Items]
Swaps Weighted-Average (in dollars per Mmbtu) | $ / MBbls	(0.65)
Crude oil (WTI Midland) | Subsequent event
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount, Volume | MBbls	1,274
Crude oil (WTI Midland) | Basis Swaps | Subsequent event
Derivative [Line Items]
Swaps Weighted-Average (in dollars per Mmbtu) | $ / MBbls	0.11
Crude oil (WTI Midland) | Subsequent event
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount, Volume | MBbls	2,184
Crude oil (WTI Midland) | Basis Swaps | Subsequent event
Derivative [Line Items]
Swaps Weighted-Average (in dollars per Mmbtu) | $ / MBbls	0.25
Crude oil (WTI Midland) | Subsequent event
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount, Volume | MBbls	2,555
Crude oil (WTI Midland) | Basis Swaps | Subsequent event
Derivative [Line Items]
Swaps Weighted-Average (in dollars per Mmbtu) | $ / MBbls	0.38
Crude oil (WTI Midland) | Subsequent event
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount, Volume | MBbls	2,920
Crude oil (WTI Midland) | Basis Swaps | Subsequent event
Derivative [Line Items]
Swaps Weighted-Average (in dollars per Mmbtu) | $ / MBbls	0.05
Crude oil (WTI) | Subsequent event
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount, Volume | MBbls	1,274
Crude oil (WTI) | Roll Swaps | Subsequent event
Derivative [Line Items]
Swaps Weighted-Average (in dollars per Mmbtu) | $ / MBbls	(0.24)
Crude oil (WTI) | Subsequent event
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount, Volume | MBbls	1,092
Crude oil (WTI) | Roll Swaps | Subsequent event
Derivative [Line Items]
Swaps Weighted-Average (in dollars per Mmbtu) | $ / MBbls	(0.20)
Crude oil (WTI) | Subsequent event
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount, Volume | MBbls	2,555
Crude oil (WTI) | Roll Swaps | Subsequent event
Derivative [Line Items]
Swaps Weighted-Average (in dollars per Mmbtu) | $ / MBbls	0.10