PROPERTY AND EQUIPMENT (Tables)

3 Months Ended

Mar. 31, 2023

PROPERTY AND EQUIPMENT.

Schedule of property and equipment

	March 31, 2023		December 31, 2022
	(in thousands)
Machinery and equipment	$	678,818	$	675,505
Buildings and leasehold improvements		148,282		145,223
Gathering and disposal infrastructure		87,848		87,568
Pipelines		72,829		72,829
Vehicles and equipment		26,187		27,850
Land		24,049		24,159
Computer equipment and software		7,472		6,765
Office furniture and equipment		894		1,183
Machinery and equipment - finance lease		519		519
Vehicles and equipment - finance lease		47		58
Computer equipment and software - finance lease		56		56
Construction in progress		65,898		42,290
		1,112,899		1,084,005
Less accumulated depreciation(1)		(597,861)		(584,451)
Total property and equipment, net	$	515,038	$	499,554

(1) Includes $0.6 million of accumulated depreciation related to finance leases as of both March 31, 2023 and December 31, 2022.

Schedule of amortization of intangible assets

	Three months ended March 31,
	2023		2022
	(in thousands)
Category
Depreciation expense from property and equipment	$	29,516	$	23,953
Amortization expense from finance leases		5		60
Amortization expense from intangible assets		3,761		2,725
Accretion expense from asset retirement obligations		256		329
Total depreciation and amortization	$	33,538	$	27,067