Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Property, Plant and Equipment, Net (Details)

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Property, Plant and Equipment, Net (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, gross $ 369,173 $ 361,092  
Accumulated depreciation (180,769) (173,437)  
Property, plant and equipment, less capital work-in-progress 188,404 187,655  
Construction work in progress 1,302 495  
Property, plant and equipment, net 189,706 188,150  
Depreciation 25,800 28,900 $ 31,600
Machinery and Equipment [Member]      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, gross 140,413 134,708  
Buildings and improvements [Member]      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, gross 149,022 139,666  
Computer Equipment and Software [Member]      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, gross 46,900 49,991  
Office equipment, furniture and fixtures [Member]      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, gross 13,780 17,616  
Land [Member]      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, gross $ 19,058 $ 19,111