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Note 21 - Other Liabilities - Plan Assets (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Statement Line Items [Line Items]    
Values at the beginning of the year $ 91,200  
At the end of the year 99,000 $ 91,200
Fair value of funded post-employment benefits [member]    
Statement Line Items [Line Items]    
Values at the beginning of the year (132,438) (145,692)
Translation differences (4,137) 7,514
Return on plan assets (5,018) (4,936)
Remeasurements (10,507) 3,967
Contributions paid to the plan (3,589) (3,108)
Benefits paid from the plan 10,259 9,453
Other 270 364
At the end of the year (145,160) (132,438)
Funded post-employment benefits [member]    
Statement Line Items [Line Items]    
Values at the beginning of the year 146,885 165,485
Translation differences (4,542) 8,182
Benefits paid from the plan 10,259 9,453
At the end of the year $ 160,412 $ 146,885
Equity instruments 49.00% 53.50%
Debt instruments 47.00% 42.80%
Others 4.00% 3.70%