Quarterly Financial Information (Unaudited) - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Impairments of goodwill				$ 406,100	$ 165,000				$ 406,056	$ 165,000	$ 0
Impairment of fixed assets									10,468	33,697
Impairments of inventories				25,200					31,151	0	0
Severance and restructuring charges	$ 2,700	$ 300	$ 5,400	700	600	$ 700	$ 1,300	$ 1,000	9,069	3,502	1,629
Impairments of fixed and lease assets									12,447	33,697	0
Downhole Technologies
Segment Reporting Information [Line Items]
Impairments of goodwill					165,000				192,502	165,000
Impairments of inventories									5,900
Impairments of fixed and lease assets									3,600
Downhole Technologies | Operating Segments
Segment Reporting Information [Line Items]
Impairments of goodwill				406,100	$ 165,000				192,502	165,000
Impairment of fixed assets									1,623	0
Impairments of inventories									5,921
Severance and restructuring charges									2,018	0	0
Downhole Technologies | Drilling Services
Segment Reporting Information [Line Items]
Impairment of fixed assets									1,600
Total Well Site Services
Segment Reporting Information [Line Items]
Impairments of goodwill									127,054	0
Total Well Site Services | Drilling Services
Segment Reporting Information [Line Items]
Impairments of goodwill									0	0
Impairment of fixed assets									5,200	33,700
Total Well Site Services | Drilling Services | Operating Segments
Segment Reporting Information [Line Items]
Impairments of goodwill									0	0
Impairment of fixed assets			$ 3,000	5,200		$ 33,700			5,198	33,697
Impairments of inventories		$ 5,900							0
Severance and restructuring charges									$ 217	$ 0	$ 0
Impairments of fixed and lease assets	$ 4,300
goodwill and fixed assets impairment				$ 411,300