Derivative Financial Instruments (Details) $ in Thousands	Apr. 29, 2020 bbl $ / bbl	Mar. 31, 2020 USD ($) bbl $ / bbl
Open costless collar contracts
Summary of contracts for oil and natural gas
Fair Value of Asset (Liability) \| $		$ 95,553
Open Swap Contracts
Summary of contracts for oil and natural gas
Fair Value of Asset (Liability) \| $		$ 36,997
Derivative Contract, Calculation Period One \| Open costless collar contracts \| Oil - WTI
Summary of contracts for oil and natural gas
Notional Quantity (Bbl or MMBtu) \| bbl		5,205,000
Weighted Average Price Floor ($/Bbl or $/MMBtu)		47.68
Weighted Average Price Ceiling ($/Bbl or $/MMBtu)		66.69
Fair Value of Asset (Liability) \| $		$ 95,553
Derivative Contract, Calculation Period One \| Open Swap Contracts \| Oil Basis Swaps
Summary of contracts for oil and natural gas
Notional Quantity (Bbl or MMBtu) \| bbl		7,335,000
Fair Value of Asset (Liability) \| $		$ 23,318
Derivative, Swap Type, Average Fixed Price		0.61
Derivative Contract, Calculation Period Two \| Open Swap Contracts \| Oil Basis Swaps
Summary of contracts for oil and natural gas
Notional Quantity (Bbl or MMBtu) \| bbl		8,400,000
Fair Value of Asset (Liability) \| $		$ 8,552
Derivative, Swap Type, Average Fixed Price		0.87
Derivative Contract, Calculation Period Three \| Open Swap Contracts \| Oil Basis Swaps
Summary of contracts for oil and natural gas
Notional Quantity (Bbl or MMBtu) \| bbl		5,520,000
Fair Value of Asset (Liability) \| $		$ 5,127
Derivative, Swap Type, Average Fixed Price		0.95
Subsequent Event \| Open Put Contracts \| Oil
Summary of contracts for oil and natural gas
Notional Quantity (Bbl or MMBtu) \| bbl	391,500
Derivative, Swap Type, Average Fixed Price	48.15
Subsequent Event \| Derivative Contract, Calculation Period One \| Open costless collar contracts \| Oil
Summary of contracts for oil and natural gas
Notional Quantity (Bbl or MMBtu) \| bbl	2,311,500
Weighted Average Price Floor ($/Bbl or $/MMBtu)	47.94
Weighted Average Price Ceiling ($/Bbl or $/MMBtu)	66.19
Subsequent Event \| Derivative Contract, Calculation Period One \| Open Swap Contracts \| Oil
Summary of contracts for oil and natural gas
Notional Quantity (Bbl or MMBtu) \| bbl	7,620,000
Derivative, Swap Type, Average Fixed Price	34.93
Subsequent Event \| Derivative Contract, Calculation Period Two \| Open costless collar contracts \| Natural Gas
Summary of contracts for oil and natural gas
Notional Quantity (Bbl or MMBtu) \| bbl	3,200,000
Weighted Average Price Floor ($/Bbl or $/MMBtu)	2.52
Weighted Average Price Ceiling ($/Bbl or $/MMBtu)	3.71
Subsequent Event \| Derivative Contract, Calculation Period Three \| Open costless collar contracts \| Natural Gas
Summary of contracts for oil and natural gas
Notional Quantity (Bbl or MMBtu) \| bbl	4,800,000
Weighted Average Price Floor ($/Bbl or $/MMBtu)	2.52
Weighted Average Price Ceiling ($/Bbl or $/MMBtu)	3.71
Subsequent Event \| Derivative Contract, Calculation Period Four \| Open Swap Contracts \| Oil
Summary of contracts for oil and natural gas
Notional Quantity (Bbl or MMBtu) \| bbl	2,040,000
Derivative, Swap Type, Average Fixed Price	35.26

Open costless collar contracts for oil and natural gas.

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- Definition

Fair values as of the balance sheet date of the net amount of all assets and liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments.

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-Publisher FASB
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- Definition

The cap rate on a price risk derivative such as a cap or collar. A payment or receipt is triggered if the market rate exceeds the cap rate on the contract.

+ References

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Floor rate on a price risk derivative such as a floor or a collar. A payment or receipt is triggered if the market rate falls below the floor rate on the contract.

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Nominal number of units used to calculate payment on derivative.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
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-Topic 815
-SubTopic 10
-Section 50
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- Definition

Average fixed price related to the group of price risk swap derivatives.

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