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Property, Plant and Equipment
12 Months Ended
Dec. 31, 2025
Property, Plant and Equipment  
Property, Plant and Equipment

Note 9: Property, Plant and Equipment

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

December 31, 

  ​ ​ ​

2025

  ​ ​ ​

2024

(in thousands)

  ​

  ​

Land

$

21,084

$

19,802

Buildings and leasehold improvements

 

114,974

 

132,871

Operating equipment

 

968,751

 

884,793

Computer software

 

35,229

 

19,297

Furniture and fixtures

 

5,046

 

5,157

Vehicles

 

306,809

 

311,823

Gross property, plant and equipment

 

1,451,893

 

1,373,743

Less: accumulated depreciation

 

(920,337)

 

(860,227)

Net property, plant and equipment

$

531,556

$

513,516

Depreciation expense was $151.0 million in 2025, $130.5 million in 2024, and $107.3 million in 2023. The Company transferred inventory to property, plant and equipment totaling $16.2 million in 2025, $17.0 million in 2024 and $10.9 million in 2023.