Derivative Financial Instruments (Tables)

6 Months Ended

Jun. 30, 2021

Derivative [Line Items]

Schedule of Notional Amounts of Outstanding Derivative Positions [Table Text Block]

As of June 30, 2021, we had the following outstanding derivative contracts. When aggregating multiple contracts, the weighted-average contract price is presented:

	Collars					Fixed-Price Swaps
Commodity/ Index/ Maturity Period	Quantity (Crude oil - MBbls Natural Gas - BBtu)	Weighted-Average Contract Price				Quantity (Crude Oil - MBbls Gas and Basis- BBtu)	Weighted- Average Contract Price		Fair Value June 30, 2021 (in thousands)
		Floors		Ceilings
Crude Oil
NYMEX
2021	2,502	$	38.01	$	49.29	4,976	$	41.89	$	(200,961)
2022	3,552	49.49		60.96		6,744	44.42		(169,559)
2023	—	—		—		4,602	56.23		(21,386)
Total Crude Oil	6,054					16,322			$	(391,906)
Natural Gas
NYMEX
2021	36,600	2.51		2.92		15,900	2.40		(47,880)
2022	17,400	2.50		2.89		33,600	2.70		(22,607)
2023	—	—		—		20,400	2.57		(4,761)
Total Natural Gas	54,000					69,900			(75,248)
Basis Protection - Natural Gas
CIG
2021						52,500	(0.44)		(12,885)
2022						51,000	(0.26)		(1,130)
2023						20,400	(0.23)		1,369
Total Basis Protection - Natural Gas						123,900			(12,646)
Commodity Derivatives Fair Value									$	(479,800)

Derivatives Not Designated as Hedging Instruments [Table Text Block]

The following table reflects the impact of netting agreements on gross derivative assets and liabilities as of the dates indicated:

As of June 30, 2021	Total Gross Amount Presented on the Balance Sheet		Effect of Master Netting Agreements		Total Net Amount
	(in thousands)
Derivative assets:
Derivative instruments, at fair value	$	14,055	$	(14,055)	$	—
Derivative liabilities:
Derivative instruments, at fair value	$	493,855	$	(14,055)	$	479,800

Schedule of Derivatives Instruments Statements of Financial Performance and Financial Position, Location [Table Text Block]

The following table presents the impact of our derivative instruments on our condensed consolidated statements of operations:

	Three Months Ended June 30,				Six Months Ended June 30,
Condensed Consolidated Statement of Operations Line Item	2021		2020		2021		2020
	(in thousands)
Commodity price risk management gain (loss), net
Net settlements	$	(55,135)	$	114,795	$	(85,786)	$	160,618
Net change in fair value of unsettled derivatives	(253,118)		(235,581)		(403,723)		153,294
Total commodity price risk management gain (loss), net	$	(308,253)	$	(120,786)	$	(489,509)	$	313,912