Property and Equipment - Cost of Property and Equipment and Related Accumulated Depreciaton, Depletion, and Amortization (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 189,102	$ 164,244
Less accumulated depreciation and amortization	(94,968)	(95,198)
Property and equipment, net	94,134	69,046
Depreciation and amortization	18,573	16,641	$ 10,654
Amortization of property and equipment under finance leases	$ 2,547	1,807
Minimum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	2 years
Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	39 years
Tractors and trailers
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 101,813	110,153
Tractors and trailers | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	5 years
Tractors and trailers | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	6 years
Field equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 22,139	21,780
Field equipment | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	2 years
Field equipment | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	5 years
Finance lease ROU assets
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 20,266	8,854
Less accumulated depreciation and amortization	$ (5,000)	(2,500)
Finance lease ROU assets | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	3 years
Finance lease ROU assets | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	6 years
Pipeline and related facilities
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 21,265	0
Pipeline and related facilities | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	20 years
Pipeline and related facilities | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	25 years
Linefill and base gas
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 3,333	0
Buildings
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 14,977	16,055
Buildings | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	5 years
Buildings | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	39 years
Office equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 1,893	1,951
Office equipment | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	2 years
Office equipment | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	5 years
Land
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 1,790	1,790
Construction in progress
Property, Plant and Equipment [Line Items]
Property and equipment, gross	1,626	3,661
Assets not held under finance leases
Property, Plant and Equipment [Line Items]
Depreciation and amortization	16,026	14,833	10,112
Assets held under finance leases
Property, Plant and Equipment [Line Items]
Amortization of property and equipment under finance leases	$ 2,547	$ 1,808	$ 542