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Goodwill and Intangible Assets Finite-Lived Intangible Assets (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]      
Government grants $ 1,055 $ 8,650 $ 0
Finite-Lived Intangible Assets, Gross 146,309 178,059  
Finite-Lived Intangible Assets, Accumulated Amortization (88,499) (107,046)  
Amortization expense 11,873 17,333 $ 17,945
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months 10,400    
Finite-Lived Intangible Assets, Amortization Expense, Year Two 9,800    
Finite-Lived Intangible Assets, Amortization Expense, Year Three 9,800    
Finite-Lived Intangible Assets, Amortization Expense, Year Four 8,200    
Finite-Lived Intangible Assets, Amortization Expense, Year Five $ 2,100    
Minimum [Member]      
Finite-Lived Intangible Assets [Line Items]      
Finite-Lived Intangible Asset, Useful Life 10 years    
Maximum [Member]      
Finite-Lived Intangible Assets [Line Items]      
Finite-Lived Intangible Asset, Useful Life 50 years    
Unpatented Technology [Member]      
Finite-Lived Intangible Assets [Line Items]      
Finite-Lived Intangible Assets, Gross $ 8,186 8,530  
Finite-Lived Intangible Assets, Accumulated Amortization (3,132) (2,660)  
Patents [Member]      
Finite-Lived Intangible Assets [Line Items]      
Finite-Lived Intangible Assets, Gross 1,235 7,770  
Finite-Lived Intangible Assets, Accumulated Amortization (695) (6,753)  
Trademarks and Trade Names [Member]      
Finite-Lived Intangible Assets [Line Items]      
Finite-Lived Intangible Assets, Gross 4,918 10,052  
Finite-Lived Intangible Assets, Accumulated Amortization (2,198) (6,886)  
Customer Relationships [Member]      
Finite-Lived Intangible Assets [Line Items]      
Finite-Lived Intangible Assets, Gross 119,320 138,223  
Finite-Lived Intangible Assets, Accumulated Amortization (81,614) (90,180)  
Use Rights [Member]      
Finite-Lived Intangible Assets [Line Items]      
Finite-Lived Intangible Assets, Gross 12,650 13,484  
Finite-Lived Intangible Assets, Accumulated Amortization (860) (567)  
Other Noncurrent Liabilities [Member]      
Finite-Lived Intangible Assets [Line Items]      
Government grants 8,153 8,133  
Other Current Liabilities [Member]      
Finite-Lived Intangible Assets [Line Items]      
Government grants $ 446 $ 368