Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2020

Fair Value Disclosures [Abstract]

Recurring Fair Value Measurements [Table Text Block]

The following tables set forth our recurring fair value measurements:

	Successor
	December 31, 2020
	Level 2		Level 3		Effect of Netting		Total
	(In thousands)
Financial assets (liabilities):
Commodity derivatives:
Assets	$	3,436	$	—	$	(3,436)	$	—
Liabilities	(9,142)		—		3,436		(5,706)
	$	(5,706)	$	—	$	—	$	(5,706)

	Predecessor
	December 31, 2019
	Level 2		Level 3		Effect of Netting		Total
	(In thousands)
Financial assets (liabilities):
Commodity derivatives:
Assets	$	177	$	1,204	$	(748)	$	633
Liabilities	(775)		—		748		(27)
	$	(598)	$	1,204	$	—	$	606

Reconciliations Of Level 3 Fair Value Measurements [Table Text Block]

The following tables are reconciliations of our recurring level 3 fair value measurements: 

	Net Derivatives
	Successor		Predecessor
	Period September 1, 2020 through December 31, 2020		Period January 1, 2020 through August 31, 2020		For the Year Ended December 31, 2019
	(In thousands)
Beginning of period	$	—	$	1,204	$	10,630
Total gains or losses:
Included in earnings	—		978		(1,494)
Settlements	—		(2,182)		(7,932)
End of period	$	—	$	—	$	1,204
Total gains (losses) for the period included in earnings attributable to the change in unrealized loss relating to assets still held at end of period	$	—	$	(1,204)	$	(9,426)