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Business Combination - Narrative (Details) - USD ($)
$ in Thousands
1 Months Ended
Apr. 30, 2018
Mar. 30, 2019
Dec. 31, 2018
Business Acquisition [Line Items]      
Goodwill   $ 136,057 $ 136,057
Certified Thermoplastics Co., LLC      
Business Acquisition [Line Items]      
Percentage of outstanding common stock acquired 100.00%    
Purchase price of acquisition $ 30,700    
Payments to acquire business 30,800    
Total preliminary purchase price allocation 30,800    
Intangible assets 8,100    
Inventories 2,200    
Accounts receivable 1,500    
Property and equipment 600    
Cash 100    
Other current assets 100    
Total liabilities assumed 400    
Goodwill $ 18,600    
Useful Life (In years) 10 years    
Certified Thermoplastics Co., LLC | Customer relationships      
Business Acquisition [Line Items]      
Intangible assets $ 6,900    
Certified Thermoplastics Co., LLC | Trade names and trademarks      
Business Acquisition [Line Items]      
Intangible assets $ 1,200