Revenue From Contracts With Customers - Unbilled Receivables (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2020 USD ($)
Unbilled Revenues [Roll Forward]
Unbilled receivables at December 31, 2019	$ 11,815
Recognition of unbilled receivables	55,132
Revenues billed to customers	(58,591)
Unbilled receivables at March 31, 2020	8,356
New Venture
Unbilled Revenues [Roll Forward]
Unbilled receivables at December 31, 2019	5,222
Unbilled receivables at March 31, 2020	1,586
Imaging and Reservoir Services
Unbilled Revenues [Roll Forward]
Unbilled receivables at December 31, 2019	6,539
Unbilled receivables at March 31, 2020	5,643
Devices
Unbilled Revenues [Roll Forward]
Unbilled receivables at December 31, 2019	54
Unbilled receivables at March 31, 2020	$ 1,127