Revenue (Disaggregation Of Revenues, By Type) (Details) - USD ($) $ in Thousands	1 Months Ended	2 Months Ended	3 Months Ended
	Feb. 02, 2021	Mar. 31, 2021	Mar. 31, 2021	Mar. 31, 2020
Disaggregation of Revenue [Line Items]
Total revenues	$ 56,647	$ 129,095	$ 321,497	$ 321,497
Drilling Products and Services [Member]
Disaggregation of Revenue [Line Items]
Total revenues				103,993
Onshore Completion and Workover Services [Member]
Disaggregation of Revenue [Line Items]
Total revenues				61,218
Production Services [Member]
Disaggregation of Revenue [Line Items]
Total revenues				101,504
Technical Solutions [Member]
Disaggregation of Revenue [Line Items]
Total revenues				54,782
Services [Member]
Disaggregation of Revenue [Line Items]
Total revenues	30,189	69,801		180,236
Services [Member] | Drilling Products and Services [Member]
Disaggregation of Revenue [Line Items]
Total revenues	19,203	44,586		91,313
Services [Member] | Technical Solutions [Member]
Disaggregation of Revenue [Line Items]
Total revenues	10,986	25,215		88,923
Rentals [Member]
Disaggregation of Revenue [Line Items]
Total revenues	15,123	32,915		100,105
Rentals [Member] | Drilling Products and Services [Member]
Disaggregation of Revenue [Line Items]
Total revenues	12,920	27,063		79,824
Rentals [Member] | Technical Solutions [Member]
Disaggregation of Revenue [Line Items]
Total revenues	2,203	5,852		20,281
Product Sales [Member]
Disaggregation of Revenue [Line Items]
Total revenues	11,335	26,379		41,156
Product Sales [Member] | Drilling Products and Services [Member]
Disaggregation of Revenue [Line Items]
Total revenues	8,755	19,173		33,646
Product Sales [Member] | Technical Solutions [Member]
Disaggregation of Revenue [Line Items]
Total revenues	$ 2,580	$ 7,206		$ 7,510