Quarterly report pursuant to Section 13 or 15(d)

Subsequent Events (Details)

v3.19.2
Subsequent Events (Details)
$ in Thousands
1 Months Ended 3 Months Ended
Jul. 12, 2019
USD ($)
Aug. 09, 2019
shares
Jun. 30, 2019
USD ($)
shares
Jun. 30, 2018
shares
Sep. 30, 2018
USD ($)
Subsequent Event [Line Items]          
Goodwill | $     $ 36,968   $ 32,919
Class A Common Stock          
Subsequent Event [Line Items]          
Total shares converted (in shares)     20,225,202 2,600,000  
Class B Common Stock          
Subsequent Event [Line Items]          
Total shares converted (in shares)     20,225,202 2,600,000  
Conversion rate     1    
Subsequent Event | Class A Common Stock          
Subsequent Event [Line Items]          
Shares converted (in shares)   32,567,545      
Subsequent Event | Class B Common Stock          
Subsequent Event [Line Items]          
Total shares converted (in shares)   125,000      
Conversion rate   1      
Shares converted (in shares)   19,114,417      
Subsequent Event | Alabama | Hot Mix Asphalt Manufacturing Plan          
Subsequent Event [Line Items]          
Purchase price | $ $ 5,000        
Goodwill | $ $ 2,400