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Fair Value Measurements (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Recurring | Level 2 | Commodity derivative contracts, net
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Commodity derivative contracts, net	$ 0	$ (207)
Nonrecurring | Carrying Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Senior notes	341,984	369,213
Nonrecurring | Carrying Value | 2021 Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Senior notes	0	28,790
Nonrecurring | Carrying Value | 2024 Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Senior notes	51,317	50,173
Nonrecurring | Carrying Value | 2025 Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Senior notes	290,667	290,250
Nonrecurring | Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Senior notes	362,366	372,487
Nonrecurring | Fair Value | 2021 Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Senior notes	0	28,581
Nonrecurring | Fair Value | 2024 Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Senior notes	55,220	55,214
Nonrecurring | Fair Value | 2025 Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Senior notes	$ 307,146	$ 288,692

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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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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-Topic 815
-SubTopic 10
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Fair value portion of notes payable.

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-Topic 210
-SubTopic 10
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