Property and Equipment (Tables)

3 Months Ended

Mar. 31, 2020

Property, Plant and Equipment [Abstract]

The historical costs of our property and equipment and related accumulated depreciation balances were as follows at the dates indicated (in thousands):


	Estimated
	Useful Life	March 31,		December 31,
	in Years	2020		2019

Tractors and trailers ⁽¹⁾	5 – 6	$	116,509	$	115,693
Field equipment ⁽²⁾	2 – 5	25,149		25,094
Buildings	5 – 39	16,055		16,055
Office equipment	2 – 5	1,958		1,951
Land		1,790		1,790
Construction in progress		283		3,661
Total		161,744		164,244
Less accumulated depreciation		(96,363)		(95,198)
Property and equipment, net		$	65,381	$	69,046

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(1)Amounts include tractors held under finance leases in our crude oil marketing segment. At March 31, 2020 and December 31, 2019, gross property and equipment associated with these assets held under finance leases were $5.5 million and $5.5 million, respectively. Accumulated amortization associated with these assets held under these finance leases were $2.0 million and $1.7 million at March 31, 2020 and December 31, 2019, respectively (see Note 12 for further information).

(2)Amounts include a tank storage and throughput arrangement in our crude oil marketing segment held under a finance lease. At March 31, 2020 and December 31, 2019, gross property and equipment associated with these assets held under a finance lease were $3.3 million and $3.3 million, respectively. Accumulated amortization associated with these assets held under a finance lease was $1.0 million and $0.7 million at March 31, 2020 and December 31, 2019, respectively (see Note 12 for further information).

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


	Three Months Ended
	March 31,
	2020		2019

Depreciation and amortization, excluding amounts under finance leases	$	3,920	$	3,344
Amortization of property and equipment under finance leases	553		245
Total depreciation and amortization	$	4,473	$	3,589