Quarterly report pursuant to Section 13 or 15(d)

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

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Property, Plant, and Equipment - Schedule of Property, Plant and Equipment (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Sep. 30, 2021
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment, gross $ 685,647 $ 651,928
Accumulated depreciation, depletion, and amortization (263,938) (250,803)
Construction in progress 7,256 3,707
Total property, plant and equipment, net 428,965 404,832
Construction equipment    
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment, gross 357,051 333,966
Plants    
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment, gross 149,441 143,172
Mineral reserves    
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment, gross 86,827 86,556
Land and improvements    
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment, gross 57,096 53,415
Buildings    
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment, gross 27,463 27,163
Furniture and fixtures    
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment, gross 6,539 6,426
Leasehold improvements    
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment, gross $ 1,230 $ 1,230