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Asset Impairments and Other Restructuring Items - Narrative (Details) $ in Thousands	1 Months Ended	3 Months Ended				6 Months Ended
	Mar. 31, 2020	Jun. 30, 2021 USD ($)	Mar. 31, 2021 USD ($)	Jun. 30, 2020 USD ($)	Mar. 31, 2020 USD ($)	Jun. 30, 2021 USD ($) reportingUnit	Jun. 30, 2020 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Impaired Long-Lived Assets Held and Used [Line Items]
Percentage decline in crude oil prices	50.00%
Reduction of payroll tax expense		$ 2,800				$ 7,600
Number of reporting units with goodwill balances | reportingUnit						3
Goodwill, net		76,579				$ 76,579		$ 76,489	$ 482,300
Impairments of goodwill		0		$ 0	$ 406,056	0	$ 406,056
Fixed assets		2,794	$ 650	2,992	5,198	3,444	8,190
Impairment of operating lease assets		2,794
Offshore/Manufactured Products
Impaired Long-Lived Assets Held and Used [Line Items]
Goodwill, net		76,500				76,500		$ 76,500
Impairments of goodwill							86,500
Well Site Services
Impaired Long-Lived Assets Held and Used [Line Items]
Impairments of goodwill							127,100
Operating lease, liability		1,900				1,900
Well Site Services | Well Site Services Drilling Services
Impaired Long-Lived Assets Held and Used [Line Items]
Fixed assets					$ 5,200		$ 8,200
Well Site Services | Completion Services
Impaired Long-Lived Assets Held and Used [Line Items]
Fixed assets			$ 700	$ 3,000		$ 3,400
Impairment of operating lease assets		$ 2,800

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