Revenue (Disaggregation Of Revenues, By Geography) (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		8 Months Ended		9 Months Ended
	Feb. 02, 2021	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2021	Sep. 30, 2021	Sep. 30, 2020
Disaggregation of Revenue [Line Items]
Total revenues	$ 45,928	$ 178,583	$ 135,976	$ 450,318	$ 450,318	$ 521,797	$ 521,797
U.S. Land [Member]
Disaggregation of Revenue [Line Items]
Total revenues	8,296	32,265	15,536		73,070		85,665
U.S. Offshore [Member]
Disaggregation of Revenue [Line Items]
Total revenues	15,567	51,753	48,612		145,041		187,230
International [Member]
Disaggregation of Revenue [Line Items]
Total revenues	22,065	94,566	71,828	$ 232,207	232,208	94,565	248,902
Rentals [Member]
Disaggregation of Revenue [Line Items]
Total revenues	18,339	76,217			185,902
Rentals [Member] | U.S. Land [Member]
Disaggregation of Revenue [Line Items]
Total revenues	4,917	25,627			57,525
Rentals [Member] | U.S. Offshore [Member]
Disaggregation of Revenue [Line Items]
Total revenues	8,196	28,997			76,290
Rentals [Member] | International [Member]
Disaggregation of Revenue [Line Items]
Total revenues	5,226	21,593			52,087
Well Services [Member]
Disaggregation of Revenue [Line Items]
Total revenues	27,589	102,366			264,416
Well Services [Member] | U.S. Land [Member]
Disaggregation of Revenue [Line Items]
Total revenues	3,379	6,638			15,545
Well Services [Member] | U.S. Offshore [Member]
Disaggregation of Revenue [Line Items]
Total revenues	7,371	22,756			68,751
Well Services [Member] | International [Member]
Disaggregation of Revenue [Line Items]
Total revenues	$ 16,839	$ 72,972			$ 180,120
Drilling Products and Services [Member]
Disaggregation of Revenue [Line Items]
Total revenues			56,001				227,344
Drilling Products and Services [Member] | U.S. Land [Member]
Disaggregation of Revenue [Line Items]
Total revenues			10,459				66,652
Drilling Products and Services [Member] | U.S. Offshore [Member]
Disaggregation of Revenue [Line Items]
Total revenues			26,242				92,053
Drilling Products and Services [Member] | International [Member]
Disaggregation of Revenue [Line Items]
Total revenues			19,301				68,639
Production Services [Member]
Disaggregation of Revenue [Line Items]
Total revenues			46,962				165,828
Production Services [Member] | U.S. Land [Member]
Disaggregation of Revenue [Line Items]
Total revenues			383				5,016
Production Services [Member] | U.S. Offshore [Member]
Disaggregation of Revenue [Line Items]
Total revenues			6,630			24,293
Production Services [Member] | International [Member]
Disaggregation of Revenue [Line Items]
Total revenues			39,948				136,519
Technical Solutions [Member]
Disaggregation of Revenue [Line Items]
Total revenues			33,013				128,625
Technical Solutions [Member] | U.S. Land [Member]
Disaggregation of Revenue [Line Items]
Total revenues			4,694				13,997
Technical Solutions [Member] | U.S. Offshore [Member]
Disaggregation of Revenue [Line Items]
Total revenues			15,740			$ 70,884
Technical Solutions [Member] | International [Member]
Disaggregation of Revenue [Line Items]
Total revenues			$ 12,579				$ 43,744