Property and Equipment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 200,174		$ 200,174		$ 199,643
Less accumulated depreciation and amortization	(115,646)		(115,646)		(111,607)
Property and equipment, net	84,528		84,528		88,036
Total depreciation and amortization	5,088	$ 4,801	10,101	$ 9,854
Assets not held under finance leases
Property, Plant and Equipment [Line Items]
Total depreciation and amortization	3,827	3,591	7,632	7,504
Assets held under finance leases
Property, Plant and Equipment [Line Items]
Total depreciation and amortization	1,261	$ 1,210	$ 2,469	$ 2,350
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	109,390		$ 109,390		106,558
Tractors and trailers | Assets held under finance leases
Property, Plant and Equipment [Line Items]
Less accumulated depreciation and amortization	(8,900)		$ (8,900)		(9,800)
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	22,959		$ 22,959		22,851
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	20,929		$ 20,929		22,349
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	20,408		$ 20,408		20,336
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	3,922		$ 3,922		3,922
Buildings
Property, Plant and Equipment [Line Items]
Property and equipment, gross	16,163		$ 16,163		16,163
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	2,888		$ 2,888		2,060
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	2,008		$ 2,008		2,008
Construction in progress
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 1,507		$ 1,507		$ 3,396