Additional Balance Sheet Details (Tables)

12 Months Ended

Dec. 31, 2020

Text Block [Abstract]

Accounts Payable and Accrued Liabilities

Accounts Payable and Accrued Liabilities

	Successor		Predecessor
In thousands	December 31, 2020		December 31, 2019
Accrued general and administrative expenses	$	21,825	$	21,838
Accrued lease operating expenses	21,294		26,686
Accounts payable	18,629		29,077
Taxes payable	17,221		21,274
Accrued compensation	7,512		36,366
Accrued exploration and development costs	1,861		7,811
Accrued interest	1,833		25,253
Other	22,496		15,527
Total	$	112,671	$	183,832

Trade and Other Receivables, Net

Valuation Allowance [Line Items]

Changes in Valuation Allowance

Rollforward of Allowance for Doubtful Accounts

	Successor		Predecessor
	Period from Sept. 19, 2020 through Dec. 31, 2020		Period from Jan. 1, 2020 through Sept. 18, 2020		Year Ended
In thousands					Dec. 31, 2019		Dec. 31, 2018
Beginning balance	$	22,146	$	17,137	$	17,070	$	229
Provision for doubtful accounts	1,060		5,297		68		16,911
Write-offs	—		(288)		(1)		(70)
Ending balance	$	23,206	$	22,146	$	17,137	$	17,070