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Business Acquisition - Narrative (Details) - USD ($)
$ in Thousands
12 Months Ended
Apr. 10, 2017
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Apr. 09, 2017
Business Acquisition [Line Items]          
Federal statutory tax rate   21.00% 21.00% 35.00%  
Contingent consideration     $ 456    
Other Income          
Business Acquisition [Line Items]          
Reduction in contingent liability   $ 500      
Other Long-term Liability          
Business Acquisition [Line Items]          
Contingent consideration         $ 500
Tony Bagliore Concrete, Inc. (TBC)          
Business Acquisition [Line Items]          
Payments to acquire businesses $ 6,000        
Maximum contingent consideration         2,000
Contingent consideration         456
Goodwill, net of working capital adjustment         $ 3,100
Minimum | Tony Bagliore Concrete, Inc. (TBC)          
Business Acquisition [Line Items]          
Property and equipment useful life   3 years      
Maximum | Tony Bagliore Concrete, Inc. (TBC)          
Business Acquisition [Line Items]          
Property and equipment useful life   15 years