XML 118 R101.htm IDEA: XBRL DOCUMENT v3.19.1
Provisions - Employee obligations - France - (Details) - France
$ in Thousands
 12 Months Ended
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Changes in net defined benefit liability (asset) [abstract]    
Percentage change in cost of provision 1 1
Change in obligation $ 3,664 $ 3,970
Not later than one year    
Estimated Future Benefit Payments [Abstract]    
Estimated future benefit payments 1,597  
Later than one year and not later than two years    
Estimated Future Benefit Payments [Abstract]    
Estimated future benefit payments 977  
Later than two years and not later than three years    
Estimated Future Benefit Payments [Abstract]    
Estimated future benefit payments 1,179  
Later than three years and not later than four years    
Estimated Future Benefit Payments [Abstract]    
Estimated future benefit payments 1,329  
Later than four years and not later than five years    
Estimated Future Benefit Payments [Abstract]    
Estimated future benefit payments 2,007  
Later than five years and not later than ten years [member]    
Estimated Future Benefit Payments [Abstract]    
Estimated future benefit payments 8,628  
Ferro Pem S A S [Member] | Present value of defined benefit obligation [member]    
Changes in net defined benefit liability (asset) [abstract]    
Obligations at beginning of year 29,768 29,733
Current service cost 1,678 1,834
Borrowing costs 470 383
Actuarial differences (700) (4,570)
Benefits paid (1,818) (1,471)
Exchange differences (1,349) 3,859
Obligations at end of year $ 28,049 $ 29,768