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Note 18 - Borrowings - Maturity of Borrowings (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Statement Line Items [Line Items]    
Total borrowings $ 539,007 $ 965,859
Interest to be accrued (*) [1] 10,692 18,290
Total 549,699 984,149
Not later than one year [member]    
Statement Line Items [Line Items]    
Total borrowings 509,820 931,214
Interest to be accrued (*) [1] 8,182 14,512
Total 518,002 945,726
Later than one year and not later than two years [member]    
Statement Line Items [Line Items]    
Total borrowings 4,271 4,935
Interest to be accrued (*) [1] 1,175 1,212
Total 5,446 6,147
Later than two years and not later than three years [member]    
Statement Line Items [Line Items]    
Total borrowings 4,771 4,484
Interest to be accrued (*) [1] 1,166 1,203
Total 5,937 5,687
Later than three years and not later than four years [member]    
Statement Line Items [Line Items]    
Total borrowings 20,145 4,978
Interest to be accrued (*) [1] 169 1,190
Total 20,314 6,168
Later than four years and not later than five years [member]    
Statement Line Items [Line Items]    
Total borrowings 20,248
Interest to be accrued (*) [1] 174
Total 20,422
Later than five years [member]    
Statement Line Items [Line Items]    
Total borrowings
Interest to be accrued (*) [1]
Total
Finance lease liabilities [member]    
Statement Line Items [Line Items]    
Total borrowings 44 197
Finance lease liabilities [member] | Not later than one year [member]    
Statement Line Items [Line Items]    
Total borrowings 44 138
Finance lease liabilities [member] | Later than one year and not later than two years [member]    
Statement Line Items [Line Items]    
Total borrowings 59
Finance lease liabilities [member] | Later than two years and not later than three years [member]    
Statement Line Items [Line Items]    
Total borrowings
Finance lease liabilities [member] | Later than three years and not later than four years [member]    
Statement Line Items [Line Items]    
Total borrowings
Finance lease liabilities [member] | Later than four years and not later than five years [member]    
Statement Line Items [Line Items]    
Total borrowings
Finance lease liabilities [member] | Later than five years [member]    
Statement Line Items [Line Items]    
Total borrowings
Other borrowings [member]    
Statement Line Items [Line Items]    
Total borrowings 538,963 965,662
Other borrowings [member] | Not later than one year [member]    
Statement Line Items [Line Items]    
Total borrowings 509,776 931,076
Other borrowings [member] | Later than one year and not later than two years [member]    
Statement Line Items [Line Items]    
Total borrowings 4,271 4,876
Other borrowings [member] | Later than two years and not later than three years [member]    
Statement Line Items [Line Items]    
Total borrowings 4,771 4,484
Other borrowings [member] | Later than three years and not later than four years [member]    
Statement Line Items [Line Items]    
Total borrowings 20,145 4,978
Other borrowings [member] | Later than four years and not later than five years [member]    
Statement Line Items [Line Items]    
Total borrowings 20,248
Other borrowings [member] | Later than five years [member]    
Statement Line Items [Line Items]    
Total borrowings
[1] Includes the effect of hedge accounting.