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Goodwill and Intangible Assets, Intangible Assets (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Intangible assets [Abstract]      
Cost $ 21,540 $ 39,192  
Accumulated Amortization (9,738) (20,325)  
Intangible assets 11,802 18,867  
Intangible assets expense [Abstract]      
Amortization expense of intangible assets 2,900 2,300 $ 1,600
Estimated Amortization Expense [Abstract]      
2020 1,800    
2021 1,800    
2022 1,800    
2023 1,500    
2024 1,300    
Held-for-sale [Member]      
Intangible assets [Abstract]      
Cost 18,800    
Accumulated Amortization 13,800    
Intangible assets $ 5,000    
Weighted Average [Member]      
Intangible assets [Abstract]      
Weighted Average Amortization Years 16 years    
Technological Know-how [Member]      
Intangible assets [Abstract]      
Cost $ 7,570 14,570  
Accumulated Amortization $ (1,391) (6,768)  
Technological Know-how [Member] | Weighted Average [Member]      
Intangible assets [Abstract]      
Weighted Average Amortization Years 17 years 9 months 18 days    
Customer Relationships [Member]      
Intangible assets [Abstract]      
Cost $ 3,474 8,761  
Accumulated Amortization $ (1,653) (5,673)  
Customer Relationships [Member] | Weighted Average [Member]      
Intangible assets [Abstract]      
Weighted Average Amortization Years 13 years 7 months 6 days    
Patents, Trademarks, Non-compete Agreements and Other [Member]      
Intangible assets [Abstract]      
Cost $ 10,496 15,861  
Accumulated Amortization $ (6,694) $ (7,884)  
Patents, Trademarks, Non-compete Agreements and Other [Member] | Weighted Average [Member]      
Intangible assets [Abstract]      
Weighted Average Amortization Years 15 years 6 months