Supplemental Condensed Consolidated Financial Information (Condensed Consolidating Statements of Cash Flows (Unaudited)) (Details) - USD ($) $ in Thousands	1 Months Ended	8 Months Ended	9 Months Ended
	Sep. 30, 2020	Aug. 31, 2020	Sep. 30, 2021
OPERATING ACTIVITIES:
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
Intercompany borrowings (advances), net		0
Payments on finance leases	(350)	(2,757)	(3,216)
Employee taxes paid by withholding shares	0	(43)	0
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 period	32,940	571	12,145
Cash, restricted cash, and cash equivalents, end of period		32,940	$ 49,566
Consolidating Adjustments [Member]
OPERATING ACTIVITIES:
Net cash provided by (used in) operating activities		136,858
INVESTING ACTIVITIES:
Capital expenditures		0
Producing properties and other acquisitions		0
Proceeds from disposition of property and equipment		0
Net cash provided by (used in) investing activities		0
FINANCING ACTIVITIES:
Borrowings under line of credit, including borrowings under DIP credit facility		0
Payments under line of credit		0
DIP financing costs		0
Exit facility financing costs		0
Intercompany borrowings (advances), net		(136,858)
Payments on finance leases		0
Employee taxes paid by withholding shares		0
Bank overdrafts		0
Net cash provided by (used in) financing activities		(136,858)
Net increase (decrease) in cash and cash equivalents		0
Cash, restricted cash, and cash equivalents, beginning of period	0	0
Cash, restricted cash, and cash equivalents, end of period		0
Parent [Member]
OPERATING ACTIVITIES:
Net cash provided by (used in) operating activities		(207,593)
INVESTING ACTIVITIES:
Capital expenditures		(986)
Producing properties and other acquisitions		0
Proceeds from disposition of property and equipment		1,169
Net cash provided by (used in) investing activities		183
FINANCING ACTIVITIES:
Borrowings under line of credit, including borrowings under DIP credit facility		55,300
Payments under line of credit		(31,500)
DIP financing costs		990
Exit facility financing costs		(3,225)
Intercompany borrowings (advances), net		210,398
Payments on finance leases		0
Employee taxes paid by withholding shares		(43)
Bank overdrafts		(7,269)
Net cash provided by (used in) financing activities		222,671
Net increase (decrease) in cash and cash equivalents		15,261
Cash, restricted cash, and cash equivalents, beginning of period	15,764	503
Cash, restricted cash, and cash equivalents, end of period		15,764
Combined Guarantor Subsidiaries [Member]
OPERATING ACTIVITIES:
Net cash provided by (used in) operating activities		82,769
INVESTING ACTIVITIES:
Capital expenditures		(14,585)
Producing properties and other acquisitions		(382)
Proceeds from disposition of property and equipment		4,772
Net cash provided by (used in) investing activities		(10,195)
FINANCING ACTIVITIES:
Borrowings under line of credit, including borrowings under DIP credit facility		0
Payments under line of credit		0
DIP financing costs		0
Exit facility financing costs		0
Intercompany borrowings (advances), net		(72,642)
Payments on finance leases		0
Employee taxes paid by withholding shares		0
Bank overdrafts		0
Net cash provided by (used in) financing activities		(72,642)
Net increase (decrease) in cash and cash equivalents		(68)
Cash, restricted cash, and cash equivalents, beginning of period	0	68
Cash, restricted cash, and cash equivalents, end of period		0
Combined Non-Guarantor Subsidiaries [Member]
OPERATING ACTIVITIES:
Net cash provided by (used in) operating activities		32,922
INVESTING ACTIVITIES:
Capital expenditures		(10,204)
Producing properties and other acquisitions		0
Proceeds from disposition of property and equipment		77
Net cash provided by (used in) investing activities		(10,127)
FINANCING ACTIVITIES:
Borrowings under line of credit, including borrowings under DIP credit facility		32,100
Payments under line of credit		(32,600)
DIP financing costs		0
Exit facility financing costs		0
Intercompany borrowings (advances), net		(898)
Payments on finance leases		(2,757)
Employee taxes paid by withholding shares		0
Bank overdrafts		(1,464)
Net cash provided by (used in) financing activities		(5,619)
Net increase (decrease) in cash and cash equivalents		17,176
Cash, restricted cash, and cash equivalents, beginning of period	$ 17,176	0
Cash, restricted cash, and cash equivalents, end of period		$ 17,176