v3.26.1
Business Acquisitions - Additional Information (Details)
$ in Thousands, shares in Millions
3 Months Ended 9 Months Ended
Apr. 01, 2026
USD ($)
Jan. 30, 2026
USD ($)
Oct. 20, 2025
USD ($)
plant
shares
Oct. 03, 2025
USD ($)
plant
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Sep. 30, 2025
USD ($)
Business Combination [Line Items]                  
Goodwill         $ 1,139,332   $ 1,139,332   $ 943,309
Revenues since acquisition date         101,300   249,700    
Net income         4,800   15,200    
Expenses and losses recognized         200   11,700    
Acquisition related costs         1,771 $ 1,816 15,880 $ 22,174  
Total Acquisitions                  
Business Combination [Line Items]                  
Goodwill         196,505   196,505    
Acquisition related costs         200   11,700    
VMC                  
Business Combination [Line Items]                  
Consideration transferred       $ 107,700          
Number of hot-mix asphalt plants acquired | plant       8          
Goodwill         38,607   38,607    
P&S                  
Business Combination [Line Items]                  
Consideration transferred     $ 93,300            
Number of hot-mix asphalt plants acquired | plant     2            
Common stock, shares outstanding (in shares) | shares     51.5            
Goodwill         98,287   98,287    
GMJ                  
Business Combination [Line Items]                  
Consideration transferred   $ 37,900              
Goodwill         18,680   18,680    
Four Star                  
Business Combination [Line Items]                  
Consideration transferred $ 58,200                
Goodwill         $ 40,931   $ 40,931