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Acquisitions (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Business Acquisition [Line Items]    
Payments to Acquire Businesses, Gross $ 0 $ 5,307
Revenue, Net (Deprecated 2018-01-31) 370,785 349,637
Goodwill, Acquired During Period 0 2,086
Screw Products [Member]    
Business Acquisition [Line Items]    
Payments to Acquire Businesses, Gross 5,150  
Finite-Lived Customer Relationships, Gross 2,580  
Finite-Lived Trade Names, Gross 470  
Revenue, Net (Deprecated 2018-01-31) $ 2,600 $ 600
Trade Names [Member] | Screw Products [Member]    
Business Acquisition [Line Items]    
Finite-Lived Intangible Asset, Useful Life 15 years  
Customer Relationships [Member] | Screw Products [Member]    
Business Acquisition [Line Items]    
Finite-Lived Intangible Asset, Useful Life 10 years