Property, Plant and Equipment

12 Months Ended

Dec. 31, 2022

Property, Plant and Equipment

Property, Plant and Equipment

Note 7: Property, Plant and Equipment

Property, plant and equipment are presented at cost net of accumulated depreciation and consist of the following:

December 31,	2022		2021
(in thousands)
Land	$	17,287	$	18,180
Buildings and leasehold improvements		120,506		120,649
Operating equipment		683,027		606,089
Computer software		22,194		22,925
Furniture and fixtures		5,480		6,222
Vehicles		259,933		243,647
Gross property, plant and equipment		1,108,427		1,017,712
Less: accumulated depreciation		(775,334)		(763,304)
Net property, plant and equipment	$	333,093	$	254,408

Depreciation expense was $83.0 million in 2022, $72.7 million in 2021, and $95.5 million in 2020. The Company had accounts payable for purchases of property and equipment of $9.3 million as of December 31, 2022 and $4.3 million as of December 31, 2021. The Company transferred inventory to property, plant and equipment totaling $9.9 million in 2022 and $11.1 million in 2021.