Segment Information (Schedule Of Segment Reporting Information) (Details) - USD ($) $ in Thousands	1 Months Ended		2 Months Ended	3 Months Ended
	Feb. 02, 2022	Feb. 02, 2021	Mar. 31, 2021	Mar. 31, 2022
Segment Reporting Information [Line Items]
Total revenues	$ 45,928	$ 45,928	$ 105,843	$ 197,930
Cost of revenues (exclusive of depreciation, depletion, amortization and accretion)		29,773	68,037	112,380
Depreciation, depletion, amortization and accretion		8,358	40,030	34,085
General and administrative expenses		11,052	18,438	32,018
Restructuring expense		1,270	8,383	1,555
Other gains and losses, net			169	1,147
Income (loss) from operations		(4,525)	(28,876)	16,745
Interest income (expense), net		202	212	1,179
Reorganization expenses		(335,560)
Other income (expense)		(2,105)	(2,845)	13,947
Income (loss) from continuing operations before income taxes		329,132	(31,509)	31,871
Rentals [Member]
Segment Reporting Information [Line Items]
Total revenues		18,339	42,448	88,756
Cost of revenues (exclusive of depreciation, depletion, amortization and accretion)		7,839	15,486	31,752
Depreciation, depletion, amortization and accretion		4,271	28,058	20,989
General and administrative expenses		2,027	3,451	7,365
Other gains and losses, net			165	135
Income (loss) from operations		4,202	(4,382)	28,785
Well Services [Member]
Segment Reporting Information [Line Items]
Total revenues		27,589	63,395	109,174
Cost of revenues (exclusive of depreciation, depletion, amortization and accretion)		21,934	52,551	80,628
Depreciation, depletion, amortization and accretion		3,666	11,163	11,728
General and administrative expenses		4,111	8,461	11,401
Other gains and losses, net			4	1,282
Income (loss) from operations		(2,122)	(8,776)	4,135
Corporate And Other [Member]
Segment Reporting Information [Line Items]
Depreciation, depletion, amortization and accretion		421	809	1,368
General and administrative expenses		4,914	6,526	13,252
Restructuring expense		1,270	8,383	1,555
Income (loss) from operations		$ (6,605)	$ (15,718)	$ (16,175)