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

Property, Plant and Equipment (Details)

v3.10.0.1
Property, Plant and Equipment (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, gross $ 361,092 $ 351,013  
Accumulated depreciation (173,437) (155,147)  
Property, plant and equipment, less capital work-in-progress 187,655 195,866  
Construction work in progress 495 4,085  
Property, plant and equipment, net 188,150 199,951  
Depreciation 28,900 31,600 $ 33,800
Machinery and Equipment [Member]      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, gross 134,708 133,656  
Buildings and improvements [Member]      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, gross 139,666 131,993  
Computer Equipment and Software [Member]      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, gross 49,991 48,237  
Office equipment, furniture and fixtures [Member]      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, gross 17,616 17,893  
Land [Member]      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, gross $ 19,111 $ 19,234