Fresh Start Accounting (Narrative) (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended	11 Months Ended		12 Months Ended
	Feb. 02, 2021	Dec. 31, 2021	Dec. 31, 2021	Dec. 31, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Reorganization, Chapter 11 [Line Items]
Identifiable Assets	$ 1,456,804	$ 1,199,508	$ 1,199,508	$ 1,199,508	$ 1,199,508	$ 1,501,079
Postconfirmation Liabilities	554,118	457,775	457,775	457,775	$ 457,775	1,839,726
Internal Rate Of Return					17.60%
Perpetuity Growth Rate					3.00%
Reorganization Expenses, Discount Rate					5.30%
Reorganization Expenses, Cash Used In Operating Activities	3,100				$ 13,700
Reorganization items, net	335,560			0	335,600	(19,520)	$ 0
Reorganization Expenses, Professional Fees, Expense					2,700
Reorganization Expenses, Professional Fees, Lease Rejection Damages					400
Reorganization Expenses			1,300		23,000
Well Services [Member]
Reorganization, Chapter 11 [Line Items]
Identifiable Assets		715,738	715,738	715,738	715,738	554,178
Reorganization items, net	31,816					$ 0	$ 0
Shut Down Cost		8,900
Well Services [Member] | Cost of Sales [Member]
Reorganization, Chapter 11 [Line Items]
Inventory write down		6,500
Well Services [Member] | Cost Of Services [Member]
Reorganization, Chapter 11 [Line Items]
Other ShutDown Cost		2,400
Maximum [Member]
Reorganization, Chapter 11 [Line Items]
Bankruptcy Proceedings, Enterprise Value		880,000	880,000	880,000	880,000
Minimum [Member]
Reorganization, Chapter 11 [Line Items]
Bankruptcy Proceedings, Enterprise Value		710,000	710,000	710,000	710,000
Reorganization, Chapter 11, Predecessor, before Adjustment [Member]
Reorganization, Chapter 11 [Line Items]
Identifiable Assets	1,497,411	1,456,800	1,456,800	1,456,800	1,456,800
Postconfirmation Liabilities	$ 2,076,125	$ 2,076,100	$ 2,076,100	$ 2,076,100	$ 2,076,100