Property and Equipment, Identifiable Intangible Assets and Goodwill (Tables)

6 Months Ended

Jun. 30, 2021

Property and Equipment and Identifiable Intangible Assets

Schedule of property and equipment

Property and equipment consisted of the following (in thousands):

	June 30, 2021		December 31, 2020
Compression and treating equipment	$	3,491,270	$	3,480,660
Computer equipment	53,559		53,887
Automobiles and vehicles	33,067		33,412
Leasehold improvements	8,255		8,218
Buildings	5,334		5,334
Furniture and fixtures	1,111		1,110
Land	77		77
Total property and equipment, gross	3,592,673		3,582,698
Less: accumulated depreciation and amortization	(1,301,887)		(1,202,065)
Total property and equipment, net	$	2,290,786	$	2,380,633

Depreciation expense on property and equipment and gain on disposition of assets were as follows (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2021		2020		2021		2020
Depreciation expense	$	51,882	$	52,993	$	105,567	$	104,410
Gain on disposition of assets	1,105		787		2,360		1,801

Schedule of estimated useful lives of property, plant, and equipment

Depreciation is calculated using the straight-line method over the estimated useful lives of the assets as follows:

Compression equipment, acquired new	25 years
Compression equipment, acquired used	5 - 25 years
Furniture and fixtures	3 - 10 years
Vehicles and computer equipment	1 - 10 years
Buildings	5 years
Leasehold improvements	5 years

Schedule of identifiable intangible assets

Identifiable intangible assets, net consisted of the following (in thousands):

	Customer Relationships		Trade Names		Total
Net balance as of December 31, 2020	$	302,952	$	30,839	$	333,791
Amortization expense	(13,052)		(1,638)		(14,690)
Net balance as of June 30, 2021	$	289,900	$	29,201	$	319,101