Annual report pursuant to Section 13 and 15(d)

Property, Plant and Equipment - Property, Plant and Equipment (Details)

v3.24.3
Property, Plant and Equipment - Property, Plant and Equipment (Details) - USD ($)
$ in Thousands
Sep. 30, 2024
Sep. 30, 2023
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment, gross $ 1,038,496 $ 847,667
Accumulated depreciation, depletion and amortization (426,842) (358,462)
Construction in progress 18,270 15,890
Total property, plant and equipment, net 629,924 505,095
Construction equipment    
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment, gross 570,044 447,467
Plants    
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment, gross 255,214 208,708
Land and improvements    
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment, gross 94,182 76,396
Mineral reserves    
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment, gross 69,334 69,405
Buildings    
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment, gross 39,838 36,885
Furniture and fixtures    
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment, gross 8,616 7,538
Leasehold improvements    
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment, gross $ 1,268 $ 1,268