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Note 18 - Borrowings - Non-current and Current Borrowings (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Statement Line Items [Line Items]    
Non-current costs of issue of debt $ (27) $ (40)
29,187 34,645
Current costs of issue of debt (11) (12)
509,820 931,214
Total Borrowings 539,007 965,859
Bank borrowings [member]    
Statement Line Items [Line Items]    
Non-current borrowings before costs of issue of debt 29,214 34,626
Current borrowings before costs of issue of debt 508,143 930,957
Finance lease liabilities [member]    
Statement Line Items [Line Items]    
Non-current borrowings before costs of issue of debt 59
Current borrowings before costs of issue of debt 44 138
Total Borrowings 44 197
Bank overdrafts [member]    
Statement Line Items [Line Items]    
Current borrowings before costs of issue of debt $ 1,644 $ 131