Intangible Assets - Narrative (Details) - Customer relationships - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Amortization expense	$ 13,600,000	$ 18,300,000	$ 20,300,000
Major Energy Companies, Provider Companies, And Verde Companies
Finite-Lived Intangible Assets [Line Items]
Amortization expense	9,300,000	16,500,000
Cost of revenues | Major Energy Companies, Provider Companies, And Verde Companies
Finite-Lived Intangible Assets [Line Items]
Amortization expense	$ 0	$ 100,000	$ 1,200,000