Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	1 Months Ended	8 Months Ended	9 Months Ended
	Sep. 30, 2020	Aug. 31, 2020	Sep. 30, 2021
OPERATING ACTIVITIES:
Net income (loss)	$ (6,736)	$ (890,624)	$ (13,511)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation, depletion, and amortization	7,467	115,496	49,169
Impairments (Note 3)	13,237	867,814	0
Loss on abandonment of assets (Note 3)	0	18,733	0
Amortization of debt issuance costs and debt discount	0	1,079	0
Loss on derivatives (Note 12)	(3,939)	10,704	104,973
Cash payments on derivatives settled (Note 12)	(1,418)	(4,244)	(22,647)
Loss on change in fair value of warrants (Note 13)	0	0	12,628
Gain on disposition of assets	(222)	(89)	(6,213)
Write-off of debt issuance costs	0	2,426	0
Deferred tax expense	0	(13,713)	0
Stock-based compensation plans	13	4,786	268
Credit loss expense	0	3,155	1,695
ARO liability accretion (Note 9)	116	1,545	1,381
Contract assets and liabilities, net (Note 4)	324	2,459	2,462
Capitalized contract fulfillment costs, net	0	0	(353)
Noncash reorganization items	1,024	(138,797)	(67)
Other, net	(2,623)	12,164	(1,950)
Changes in operating assets and liabilities increasing (decreasing) cash:
Accounts receivable	(2,202)	28,880	(16,255)
Material and supplies	0	89	0
Prepaid expenses and other	194	(3,849)	1,063
Accounts payable	2,366	(18,381)	12,350
Accrued liabilities	2,082	44,811	(1,607)
Income taxes	0	906	1,128
Contract advances	(9)	(394)	(88)
Net cash provided by (used in) operating activities	9,674	44,956	124,426
INVESTING ACTIVITIES:
Capital expenditures	(1,598)	(25,775)	(21,117)
Producing properties and other acquisitions	0	(382)	0
Proceeds from disposition of property and equipment	576	6,018	71,350
Net cash provided by (used in) investing activities	(1,022)	(20,139)	50,233
FINANCING ACTIVITIES:
Borrowings under line of credit, including borrowings under DIP credit facility	0	87,400	30,700
Payments under line of credit	(4,000)	(64,100)	(126,600)
DIP financing costs	0	(990)	0
Exit facility financing costs	0	(3,225)	0
Net payments on finance leases	(350)	(2,757)	(3,216)
Employee taxes paid by withholding shares	0	(43)	0
Distributions to non-controlling interests	0	0	(16,178)
Repurchase of common stock	0	0	(19,882)
Bank overdrafts	0	(8,733)	(2,631)
Net cash provided by (used in) financing activities	(4,350)	7,552	(137,807)
Net increase (decrease) in cash and cash equivalents	4,302	32,369	36,852
Cash, restricted cash, and cash equivalents, beginning of year	32,940	571	12,714
Cash, restricted cash, and cash equivalents, end of year	37,242	32,940	49,566
Cash paid (received) during the year for:
Interest paid (net of capitalized)	251	6,417	4,307
Income taxes	0	0	(1,128)
Reorganization items			4,026
Reorganization items	131	4,822
Changes in accounts payable and accrued liabilities related to purchases of property, plant, and equipment	(128)	8,561	(3,356)
Non-cash (additions) reductions to oil and natural gas properties related to asset retirement obligations	(215)	29,189	(1,674)
Non-cash trade of property and equipment	$ 0	$ 1,403	$ 0