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Acquisition (Details) - USD ($)
$ in Thousands
3 Months Ended
Sep. 30, 2019
Jun. 30, 2019
Dec. 31, 2018
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]      
Goodwill $ 60,382   $ 59,159
BMD Birmingham Acquisition [Member]      
Business Acquisition [Line Items]      
Purchase price of acquisition   $ 15,700  
Purchase price, post-closing adjustment $ 100    
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]      
Accounts receivable   5,563  
Inventories   3,395  
Other assets   8  
Property and equipment   3,487  
Lease right-of-use assets   359  
Customer relationships   2,100  
Goodwill   1,223  
Assets acquired   16,135  
Accounts payable   100  
Lease liabilities   359  
Liabilities assumed   459  
Net assets acquired   $ 15,676  
Customer Relationships [Member] | BMD Birmingham Acquisition [Member]      
Business Acquisition [Line Items]      
Customer relationship, useful life   10 years