Quarterly report pursuant to Section 13 or 15(d)

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

v3.21.2
Property, Plant, and Equipment - Schedule of Property, Plant and Equipment (Details) - USD ($)
$ in Thousands
Jun. 30, 2021
Sep. 30, 2020
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment, gross $ 529,907 $ 441,491
Accumulated depreciation, depletion and amortization (241,061) (209,532)
Construction in progress 7,851 5,271
Total property, plant and equipment, net 296,697 237,230
Construction equipment    
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment, gross 301,821 253,157
Plants    
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment, gross 123,124 102,392
Land and improvements    
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment, gross 49,016 38,760
Quarry reserves    
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment, gross 24,378 22,092
Buildings    
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment, gross 24,379 18,307
Furniture and fixtures    
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment, gross 6,054 5,648
Leasehold improvements    
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment, gross $ 1,135 $ 1,135