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Note 18 - Borrowings - Borrowings by Currency and Rate (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Statement Line Items [Line Items]    
Borrowings $ 29,187 $ 34,645
Borrowings 509,820 931,214
United States of America, Dollars | Fixed interest rate [member]    
Statement Line Items [Line Items]    
Borrowings 18,762 19,120
Borrowings 138,303 187,872
United States of America, Dollars | Floating interest rate [member]    
Statement Line Items [Line Items]    
Borrowings 16,847 17,640
Euro Member Countries, Euro | Fixed interest rate [member]    
Statement Line Items [Line Items]    
Borrowings 9,023 13,828
Borrowings 4,178 839
Euro Member Countries, Euro | Floating interest rate [member]    
Statement Line Items [Line Items]    
Borrowings 1,402 1,638
Borrowings 198 169
Other currency [member] | Fixed interest rate [member]    
Statement Line Items [Line Items]    
Borrowings 33 8
Other currency [member] | Floating interest rate [member]    
Statement Line Items [Line Items]    
Borrowings 59
Borrowings 89 138
Mexico, Pesos | Fixed interest rate [member]    
Statement Line Items [Line Items]    
Borrowings 301,047 412,719
Argentina, Pesos | Fixed interest rate [member]    
Statement Line Items [Line Items]    
Borrowings $ 49,125 $ 311,829