Annual report pursuant to Section 13 and 15(d)

Business Acquisition - Sand and Gravel Mining Operations (Detail)

v3.10.0.1
Business Acquisition - Sand and Gravel Mining Operations (Detail) - USD ($)
$ in Thousands
Sep. 22, 2017
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2016
Business Acquisition [Line Items]        
Goodwill   $ 32,919 $ 30,600 $ 29,957
Sand and gravel mining operations        
Business Acquisition [Line Items]        
Inventory $ 1,179      
Quarry reserves 4,800      
Land 1,746      
Plant 1,247      
Equipment 1,228      
Goodwill 643      
Cash payment to acquire business $ 10,843