XML 205 R47.htm IDEA: XBRL DOCUMENT v3.8.0.1
Business Acquisition - Narrative (Details) - Tony Bagliore Concrete, Inc. (TBC) - USD ($)
$ in Thousands
3 Months Ended
Apr. 10, 2017
Apr. 09, 2017
Sep. 30, 2017
Jun. 30, 2017
Business Acquisition [Line Items]        
Payments to acquire businesses $ 6,000      
Contingent considerations     $ 2,000 $ 2,000
Goodwill net of working capital adjustment   $ 3,100    
Contingent considerations, fair value   $ 456    
Minimum        
Business Acquisition [Line Items]        
Property and equipment useful life   3 years    
Maximum        
Business Acquisition [Line Items]        
Property and equipment useful life   15 years