Derivative Financial Instruments (Details) bbl in Thousands, BTU in Billions		Apr. 28, 2020 BTU $ / EnergyContent $ / Barrels bbl	Mar. 31, 2020 BTU $ / EnergyContent $ / Barrels bbl
NYMEX Oil Swap Contract Second Quarter, 2020 [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume			2,838
Derivative, Swap Type, Weighted-Average Contract Price | $ / Barrels			58.81
NYMEX Oil Swap Contract Third Quarter, 2020 [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume			3,361
Derivative, Swap Type, Weighted-Average Contract Price | $ / Barrels			56.43
NYMEX Oil Swap Contract Fourth Quarter, 2020 [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume			4,397
Derivative, Swap Type, Weighted-Average Contract Price | $ / Barrels			57.03
NYMEX Oil Swap Contract, 2021 [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume			2,085
Derivative, Swap Type, Weighted-Average Contract Price | $ / Barrels			45.70
NYMEX Oil Swap Contracts [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume			12,681
NYMEX Oil Collar Contract Second Quarter, 2020 [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume			1,881
Derivative, Weighted-Average Floor Price | $ / Barrels			55.00
Derivative, Weighted-Average Ceiling Price | $ / Barrels			62.17
NYMEX Oil Collar Contract Third Quarter, 2020 [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume			1,252
Derivative, Weighted-Average Floor Price | $ / Barrels			55.00
Derivative, Weighted-Average Ceiling Price | $ / Barrels			62.90
NYMEX Oil Collar Contract Fourth Quarter, 2020 [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume			610
Derivative, Weighted-Average Floor Price | $ / Barrels			55.00
Derivative, Weighted-Average Ceiling Price | $ / Barrels			61.90
NYMEX Oil Collar Contract, 2021 [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume			329
Derivative, Weighted-Average Floor Price | $ / Barrels			55.00
Derivative, Weighted-Average Ceiling Price | $ / Barrels			56.70
NYMEX Oil Collar Contracts [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume			4,072
WTI Midland NYMEX WTI [Member] | Oil Basis Swap Contract Second Quarter, 2020 [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume			3,637
Derivative, Oil Basis Swap Type, Weighted-Average Contract Price | $ / Barrels	[1]		(0.62)
WTI Midland NYMEX WTI [Member] | Oil Basis Swap Contract Third Quarter, 2020 [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume			3,607
Derivative, Oil Basis Swap Type, Weighted-Average Contract Price | $ / Barrels	[1]		(0.62)
WTI Midland NYMEX WTI [Member] | Oil Basis Swap Contract Fourth Quarter, 2020 [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume			4,087
Derivative, Oil Basis Swap Type, Weighted-Average Contract Price | $ / Barrels	[1]		(0.38)
WTI Midland NYMEX WTI [Member] | Oil Basis Swap Contract, 2021 [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume			11,527
Derivative, Oil Basis Swap Type, Weighted-Average Contract Price | $ / Barrels	[1]		0.87
WTI Midland NYMEX WTI [Member] | Oil Basis Swap Contract, 2022 [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume			9,500
Derivative, Oil Basis Swap Type, Weighted-Average Contract Price | $ / Barrels	[1]		1.15
WTI Midland NYMEX WTI [Member] | Oil Basis Swap [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume			32,358
NYMEX WTI ICE Brent [Member] | Oil Basis Swap Contract Second Quarter, 2020 [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume			910
Derivative, Oil Basis Swap Type, Weighted-Average Contract Price | $ / Barrels	[2]		(8.06)
NYMEX WTI ICE Brent [Member] | Oil Basis Swap Contract Third Quarter, 2020 [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume			920
Derivative, Oil Basis Swap Type, Weighted-Average Contract Price | $ / Barrels	[2]		(8.01)
NYMEX WTI ICE Brent [Member] | Oil Basis Swap Contract Fourth Quarter, 2020 [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume			920
Derivative, Oil Basis Swap Type, Weighted-Average Contract Price | $ / Barrels	[2]		(8.01)
NYMEX WTI ICE Brent [Member] | Oil Basis Swap Contract, 2021 [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume			3,650
Derivative, Oil Basis Swap Type, Weighted-Average Contract Price | $ / Barrels	[2]		(7.86)
NYMEX WTI ICE Brent [Member] | Oil Basis Swap Contract, 2022 [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume			3,650
Derivative, Oil Basis Swap Type, Weighted-Average Contract Price | $ / Barrels	[2]		(7.78)
NYMEX WTI ICE Brent [Member] | Oil Basis Swap [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume			10,050
IF HSC [Member] | Gas Swaps Contract Second Quarter, 2020 [Member]
Derivative Financial Instruments
Derivative, Swap Type, Weighted-Average Contract Price | $ / EnergyContent			2.20
Derivative, Nonmonetary Notional Amount, Energy Measure | BTU			4,160
IF HSC [Member] | Gas Swaps Contract Third Quarter, 2020 [Member]
Derivative Financial Instruments
Derivative, Swap Type, Weighted-Average Contract Price | $ / EnergyContent			2.41
Derivative, Nonmonetary Notional Amount, Energy Measure | BTU			4,493
IF HSC [Member] | Gas Swaps Contract Fourth Quarter, 2020 [Member]
Derivative Financial Instruments
Derivative, Swap Type, Weighted-Average Contract Price | $ / EnergyContent			2.32
Derivative, Nonmonetary Notional Amount, Energy Measure | BTU			6,994
IF HSC [Member] | Gas Swaps Contract, 2021 [Member]
Derivative Financial Instruments
Derivative, Swap Type, Weighted-Average Contract Price | $ / EnergyContent			2.29
Derivative, Nonmonetary Notional Amount, Energy Measure | BTU			28,621
IF HSC [Member] | Gas Swaps Contract, 2022 [Member]
Derivative Financial Instruments
Derivative, Swap Type, Weighted-Average Contract Price | $ / EnergyContent			2.23
Derivative, Nonmonetary Notional Amount, Energy Measure | BTU			6,104
IF HSC [Member] | Gas Swaps Contracts [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Energy Measure | BTU	[3]		50,372
WAHA [Member] | Gas Swaps Contract Second Quarter, 2020 [Member]
Derivative Financial Instruments
Derivative, Swap Type, Weighted-Average Contract Price | $ / EnergyContent			0.63
Derivative, Nonmonetary Notional Amount, Energy Measure | BTU			3,592
WAHA [Member] | Gas Swaps Contract Third Quarter, 2020 [Member]
Derivative Financial Instruments
Derivative, Swap Type, Weighted-Average Contract Price | $ / EnergyContent			1.07
Derivative, Nonmonetary Notional Amount, Energy Measure | BTU			4,294
WAHA [Member] | Gas Swaps Contract Fourth Quarter, 2020 [Member]
Derivative Financial Instruments
Derivative, Swap Type, Weighted-Average Contract Price | $ / EnergyContent			1.20
Derivative, Nonmonetary Notional Amount, Energy Measure | BTU			4,516
WAHA [Member] | Gas Swaps Contract, 2021 [Member]
Derivative Financial Instruments
Derivative, Swap Type, Weighted-Average Contract Price | $ / EnergyContent			1.45
Derivative, Nonmonetary Notional Amount, Energy Measure | BTU			17,533
WAHA [Member] | Gas Swaps Contract, 2022 [Member]
Derivative Financial Instruments
Derivative, Swap Type, Weighted-Average Contract Price | $ / EnergyContent			0
Derivative, Nonmonetary Notional Amount, Energy Measure | BTU			0
WAHA [Member] | Gas Swaps Contracts [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Energy Measure | BTU	[3]		29,935
IF WAHA [Member]
Derivative Financial Instruments
Index percent of natural gas fixed swaps			81.00%
GD WAHA [Member]
Derivative Financial Instruments
Index percent of natural gas fixed swaps			19.00%
OPIS Ethane Purity Mont Belvieu [Member] | NGL Swaps Contract Second Quarter, 2020 [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume			264
Derivative, Swap Type, Weighted-Average Contract Price | $ / Barrels			11.13
OPIS Ethane Purity Mont Belvieu [Member] | NGL Swaps Contract Third Quarter, 2020 [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume			0
Derivative, Swap Type, Weighted-Average Contract Price | $ / Barrels			0
OPIS Ethane Purity Mont Belvieu [Member] | NGL Swaps Contract Fourth Quarter, 2020 [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume			0
Derivative, Swap Type, Weighted-Average Contract Price | $ / Barrels			0
OPIS Ethane Purity Mont Belvieu [Member] | NGL Swaps Contracts [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume			264
OPIS Propane Mont Belvieu Non-TET [Member] | NGL Swaps Contract Second Quarter, 2020 [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume			382
Derivative, Swap Type, Weighted-Average Contract Price | $ / Barrels			22.34
OPIS Propane Mont Belvieu Non-TET [Member] | NGL Swaps Contract Third Quarter, 2020 [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume			409
Derivative, Swap Type, Weighted-Average Contract Price | $ / Barrels			22.33
OPIS Propane Mont Belvieu Non-TET [Member] | NGL Swaps Contract Fourth Quarter, 2020 [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume			466
Derivative, Swap Type, Weighted-Average Contract Price | $ / Barrels			22.29
OPIS Propane Mont Belvieu Non-TET [Member] | NGL Swaps Contracts [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume			1,257
Subsequent Event [Member] | NYMEX Oil Swap Contracts [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume		5,500
Derivative, Swap Type, Weighted-Average Contract Price | $ / Barrels		37.57
Subsequent Event [Member] | NYMEX Oil Calendar Month Average Roll Differential Contracts [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume		6,800
Derivative, Roll Differential Swap Type, Weighted-Average Contract Price | $ / Barrels		(1.24)
Subsequent Event [Member] | IF HSC [Member] | Gas Swaps Contracts [Member]
Derivative Financial Instruments
Derivative, Swap Type, Weighted-Average Contract Price | $ / EnergyContent		2.42
Derivative, Nonmonetary Notional Amount, Energy Measure | BTU		6,197
Subsequent Event [Member] | IF WAHA [Member] | Gas Swaps Contracts [Member]
Derivative Financial Instruments
Derivative, Swap Type, Weighted-Average Contract Price | $ / EnergyContent		1.57
Derivative, Nonmonetary Notional Amount, Energy Measure | BTU		2,437

[1] ⁽¹⁾  Represents the price differential between WTI Midland (Midland, Texas) and NYMEX WTI (Cushing, Oklahoma).

[2] ⁽²⁾  Represents the price differential between NYMEX WTI (Cushing, Oklahoma) and ICE Brent (North Sea).

[3] ⁽¹⁾  The Company has natural gas swaps in place that settle against Inside FERC Houston Ship Channel (“IF HSC”), Inside FERC West Texas (“IF WAHA”), and Platt’s Gas Daily West Texas (“GD WAHA”). As of March 31, 2020, WAHA volumes were comprised of 81 percent IF WAHA and 19 percent GD WAHA.