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Property and Equipment (Tables)
9 Months Ended
Sep. 30, 2024
Property, Plant and Equipment [Abstract]  
Schedule of Property and Equipment
The historical costs of our property and equipment and related accumulated depreciation and amortization balances were as follows at the dates indicated (in thousands):

Estimated
Useful LifeSeptember 30,December 31,
in Years20242023
Tractors and trailers
5 – 6
$117,113 $119,265 
Field equipment
2 – 5
25,085 25,024 
Finance lease ROU assets (1)
3 – 6
35,039 35,724 
Pipeline and related facilities
20 – 25
20,619 20,397 
Linefill and base gas (2)
N/A4,135 3,922 
Buildings
5 – 39
17,078 17,089 
Office equipment
2 – 5
3,025 3,000 
LandN/A4,163 4,163 
Construction in progressN/A8,495 3,385 
Total234,752 231,969 
Less accumulated depreciation and amortization(135,145)(126,904)
Property and equipment, net$99,607 $105,065 
_______________
(1)Our finance lease right-of-use (“ROU)” assets arise from leasing arrangements for the right to use various classes of underlying assets including tractors, trailers and a tank storage and throughput arrangement (see Note 13 for further information). Accumulated amortization of the assets presented as “Finance lease ROU assets” was $15.7 million and $11.0 million at September 30, 2024 and December 31, 2023, respectively.
(2)Linefill and base gas represents crude oil in the VEX pipeline and storage tanks we own, and the crude oil is recorded at historical cost.

Components of depreciation and amortization expense were as follows for the periods indicated (in thousands):

Three Months EndedNine Months Ended
September 30,September 30,
2024202320242023
Depreciation and amortization, excluding amounts under finance leases$3,563 $4,523 $11,589 $14,260 
Amortization of property and equipment under finance leases1,788 1,983 5,456 5,691 
Amortization of intangible assets401 430 1,242 1,338 
Total depreciation and amortization$5,752 $6,936 $18,287 $21,289