Property, Plant and Equipment (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Property, Plant and Equipment, Net
Property, plant and equipment	$ 230.7		$ 214.6
Less: accumulated depreciation	(30.8)		(25.4)
Property, plant and equipment, net	199.9		189.2
Depreciation expense	5.9	$ 3.5
Machinery and equipment
Property, Plant and Equipment, Net
Property, plant and equipment	3.7		3.7
Vehicles
Property, Plant and Equipment, Net
Property, plant and equipment	$ 2.7		2.6
Mechanical refrigeration units
Property, Plant and Equipment, Net
Estimated Useful Life (years)	30 years
Property, plant and equipment	$ 17.2		17.1
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	188.7		174.9
Other property, plant and equipment
Property, Plant and Equipment, Net
Property, plant and equipment	$ 14.1		$ 12.0
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