Property, Plant and Equipment (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Property, Plant and Equipment, Net
Property, plant and equipment	$ 214.6	$ 111.1
Less: accumulated depreciation	(25.4)	(8.7)
Property, plant and equipment, net	189.2	102.4
Depreciation expense	17.2	6.5	$ 2.1
Machinery and equipment
Property, Plant and Equipment, Net
Property, plant and equipment	3.7	3.0
Vehicles
Property, Plant and Equipment, Net
Property, plant and equipment	$ 2.6	0.2
Mechanical refrigeration units
Property, Plant and Equipment, Net
Estimated Useful Life (years)	30 years
Property, plant and equipment	$ 17.1	16.0
NGL storage tanks
Property, Plant and Equipment, Net
Estimated Useful Life (years)	15 years
Property, plant and equipment	$ 4.3	4.3
Workover rigs
Property, Plant and Equipment, Net
Property, plant and equipment	174.9	73.8
Other property, plant and equipment
Property, Plant and Equipment, Net
Property, plant and equipment	$ 12.0	$ 13.8
Minimum | Machinery and equipment
Property, Plant and Equipment, Net
Estimated Useful Life (years)	5 years
Minimum | Vehicles
Property, Plant and Equipment, Net
Estimated Useful Life (years)	3 years
Minimum | Workover rigs
Property, Plant and Equipment, Net
Estimated Useful Life (years)	5 years
Minimum | Other property, plant and equipment
Property, Plant and Equipment, Net
Estimated Useful Life (years)	3 years
Maximum | Machinery and equipment
Property, Plant and Equipment, Net
Estimated Useful Life (years)	30 years
Maximum | Vehicles
Property, Plant and Equipment, Net
Estimated Useful Life (years)	5 years
Maximum | Workover rigs
Property, Plant and Equipment, Net
Estimated Useful Life (years)	20 years
Maximum | Other property, plant and equipment
Property, Plant and Equipment, Net
Estimated Useful Life (years)	30 years