Segment Information (Schedule Of Capital Expenditures, By Segment) (Details) - USD ($) $ in Thousands	1 Months Ended	11 Months Ended	12 Months Ended
	Feb. 02, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Capital expenditures	$ 3,035	$ 34,152
Rentals [Member]
Segment Reporting Information [Line Items]
Capital expenditures	2,429	27,335	$ 24,053	$ 63,252
Well Services [Member]
Segment Reporting Information [Line Items]
Capital expenditures	$ 606	$ 6,817	19,609	28,386
Onshore Completion And Workover Services [Member]
Segment Reporting Information [Line Items]
Capital expenditures			47,653	103,722
Corporate And Other [Member]
Segment Reporting Information [Line Items]
Capital expenditures			$ 3,991	$ 12,084