Annual report pursuant to Section 13 and 15(d)

Business Acquisitions - Additional Information (Detail)

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Business Acquisitions - Additional Information (Detail) - USD ($)
$ in Thousands
12 Months Ended
Jul. 12, 2019
Feb. 28, 2019
Sep. 30, 2018
Sep. 30, 2019
May 15, 2018
Sep. 30, 2017
Business Acquisition [Line Items]            
Long-term debt     $ 63,264 $ 50,263    
Goodwill     32,919 $ 38,546   $ 30,600
Scruggs Company            
Business Acquisition [Line Items]            
Revenues     35,800      
Net income     $ 3,500      
Long-term debt         $ 1,100  
Goodwill         2,319  
Scruggs Company | Senior Notes            
Business Acquisition [Line Items]            
Long-term debt         $ 22,000  
Alabama Acquisition            
Business Acquisition [Line Items]            
Cash payment to acquire business $ 5,000          
Goodwill $ 2,400          
Florida Acquisition            
Business Acquisition [Line Items]            
Cash payment to acquire business   $ 8,900        
Goodwill   3,200        
General and administrative expenses   $ 100