Quarterly report pursuant to Section 13 or 15(d)

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

v3.20.1
Property, Plant, and Equipment - Schedule of Property, Plant and Equipment (Details) - USD ($)
$ in Thousands
Mar. 31, 2020
Sep. 30, 2019
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment, gross $ 430,775 $ 383,279
Accumulated depreciation, depletion and amortization (194,221) (177,927)
Construction in progress 3,529 518
Total property, plant and equipment, net 240,083 205,870
Construction equipment    
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment, gross 247,396 214,500
Plants    
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment, gross 98,460 92,279
Land and improvements    
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment, gross 40,092 34,365
Quarry reserves    
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment, gross 20,492 20,678
Buildings    
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment, gross 17,954 15,458
Furniture and fixtures    
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment, gross 5,246 4,864
Leasehold improvements    
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment, gross $ 1,135 $ 1,135