Leases - Lease Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Property, plant, and equipment	$ 674,903	$ 636,672
Accumulated depreciation	(426,722)	(392,344)
Property, plant and equipment, net	248,181	$ 244,328
Equipment Leased Assets
Property, Plant and Equipment [Line Items]
Property, plant, and equipment	169,993
Accumulated depreciation	(71,968)
Property, plant and equipment, net	$ 98,025
Cable Equipment
Property, Plant and Equipment [Line Items]
Useful life	1 year
Property, plant, and equipment	$ 52,144
Downhole Equipment
Property, Plant and Equipment [Line Items]
Useful life	1 year
Property, plant, and equipment	$ 32,193
Surface Equipment
Property, Plant and Equipment [Line Items]
Useful life	5 years
Property, plant, and equipment	$ 69,566
Other Lease Equipment
Property, Plant and Equipment [Line Items]
Property, plant, and equipment	$ 16,090
Minimum | Other Lease Equipment
Property, Plant and Equipment [Line Items]
Useful life	3 years
Maximum | Other Lease Equipment
Property, Plant and Equipment [Line Items]
Useful life	5 years