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Acquisitions (Details) - USD ($)
$ in Thousands
12 Months Ended
Apr. 01, 2019
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Business Acquisition [Line Items]        
Goodwill   $ 45,684 $ 44,065 $ 45,142
Acquisition-related transaction costs used in operating activities   384 0 0
Net sales   337,897 $ 367,959 $ 382,096
Schaffner Manufacturing Company Inc.        
Business Acquisition [Line Items]        
Acquisition purchase price $ 11,000      
Cash acquired from acquisition 200      
Goodwill $ 2,078      
Acquisition-related transaction costs used in operating activities   400    
Net sales   $ 14,400