Property and Equipment (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 190,206		$ 189,102
Less accumulated depreciation and amortization	(99,563)		(94,968)
Property and equipment, net	90,643		94,134
Total depreciation and amortization	5,053	$ 4,473
Assets not held under finance leases
Property, Plant and Equipment [Line Items]
Total depreciation and amortization	3,913	3,920
Assets held under finance leases
Property, Plant and Equipment [Line Items]
Total depreciation and amortization	$ 1,140	$ 553
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	$ 101,535		101,813
Tractors and trailers | Assets held under finance leases
Property, Plant and Equipment [Line Items]
Less accumulated depreciation and amortization	$ (6,200)		(5,000)
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	$ 22,318		22,139
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	$ 22,357		20,266
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	$ 21,275		21,265
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		3,333
Buildings
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 14,977		14,977
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	$ 1,905		1,893
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	$ 716		$ 1,626