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Note 21 - Other Liabilities - Post-employment Benefits (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Statement Line Items [Line Items]      
Post-employment benefits $ 144,993 $ 115,087  
Values at the beginning of the year 91,200    
Interest cost 4,616 2,914 $ 20,534
At the end of the year 99,000 91,200  
Unfunded post-employment benefits [member]      
Statement Line Items [Line Items]      
Post-employment benefits 125,573 97,318  
Values at the beginning of the year 97,318 101,889  
Translation differences (1,567) (3,849)  
Current service cost 7,978 7,400  
Interest cost 5,526 5,070  
Remeasurements [1] 7,010 (3,946)  
Increase due to business combinations 15,660  
Benefits paid from the plan (9,328) (9,719)  
Other 2,976 473  
At the end of the year 125,573 97,318 101,889
Funded post-employment benefits [member]      
Statement Line Items [Line Items]      
Post-employment benefits 19,420 17,769  
Values at the beginning of the year 146,885 165,485  
Translation differences 4,542 (8,182)  
Current service cost 721 1,328  
Interest cost 5,754 5,691  
Remeasurements [2] 12,769 (7,984)  
Benefits paid from the plan (10,259) (9,453)  
At the end of the year 160,412 146,885 $ 165,485
Present value of funded obligations 160,412 146,885  
Fair value of plan assets (145,160) (132,438)  
Liability [3] $ 15,252 $ 14,447  
[1] For 2019 a loss of $1.3 million is attributable to demographic assumptions and a loss of $5.7 million to financial assumptions. For 2018 a gain of $0.2 million is attributable to demographic assumptions and a gain of $3.7 million to financial assumptions.
[2] For 2019 a loss of $0.4 million is attributable to demographic assumptions and a loss of $12.4 million to financial assumptions. For 2018 a loss of $0.4 million is attributable to demographic assumptions and a gain of $8.4 million to financial assumptions. respectively.
[3] In 2019 and 2018, $4.2 million and $3.3 million corresponding to a plan with a surplus balance were reclassified within other non-current assets, respectively.