Property, Plant and Equipment

12 Months Ended

Dec. 31, 2023

Property, Plant and Equipment

Property, Plant and Equipment

Note 8: Property, Plant and Equipment

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

December 31,	2023		2022
(in thousands)
Land	$	18,165	$	17,287
Buildings and leasehold improvements		129,513		120,506
Operating equipment		784,826		683,027
Computer software		19,535		22,194
Furniture and fixtures		5,298		5,480
Vehicles		288,735		259,933
Gross property, plant and equipment		1,246,072		1,108,427
Less: accumulated depreciation		(810,933)		(775,334)
Net property, plant and equipment	$	435,139	$	333,093

Depreciation expense was $108.1 million in 2023, $83.0 million in 2022, and $72.7 million in 2021. The Company had accounts payable for purchases of property and equipment of $9.0 million as of December 31, 2023, and $9.3 million as of December 31, 2022. The Company transferred inventory to property, plant and equipment totaling $10.9 million in 2023 and $9.9 million in 2022.