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Property, Plant and Equipment (Details) - USD ($)
$ in Thousands
Dec. 31, 2025
Dec. 31, 2024
Property, Plant and Equipment    
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
Land    
Property, Plant and Equipment    
Gross property, plant and equipment 21,084 19,802
Buildings and leasehold improvements    
Property, Plant and Equipment    
Gross property, plant and equipment 114,974 132,871
Operating equipment    
Property, Plant and Equipment    
Gross property, plant and equipment 968,751 884,793
Computer software    
Property, Plant and Equipment    
Gross property, plant and equipment 35,229 19,297
Furniture and fixtures    
Property, Plant and Equipment    
Gross property, plant and equipment 5,046 5,157
Vehicles    
Property, Plant and Equipment    
Gross property, plant and equipment $ 306,809 $ 311,823