Description of Business - Discontinued Operations Narrative (Details) - Discontinued Operations - USD ($)			12 Months Ended
	Dec. 31, 2020	Mar. 31, 2020	Dec. 31, 2020	Dec. 31, 2019
Contract drilling equipment
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Asset impairment				$ 3,200,000
Pressure Pumping Operations And Contract Drilling Operation
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Carrying value, held for sale				91,800,000
Asset impairment				32,600,000
Asset impairments	$ 2,000,000.0	$ 2,300,000	$ 4,378,000	35,801,000
Capital expenditures on discontinued operations			0	10,600,000
Finance lease additions			0	1,500,000
Proceeds from sales of assets			$ 42,700,000	$ 10,700,000