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Income and expenses - Finance Income and Finance Costs (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Finance income |  |  |  |  |
Finance income of related parties (Note 23) | $ 72 | $ 224 |  | $ 74 |
Other finance income | 5,302 | 3,484 |  | 1,462 |
Finance income | 5,374 | 3,708 | [1] | 1,536 | [1]
Finance costs |  |  |  |  |
Interest on debt instruments | 34,188 | 28,961 |  |  |
Interest on loans and credit facilities | 8,249 | 15,834 |  | 18,630 |
Interest on note and bill discounting | 205 | 7,403 |  | 1,503 |
Interest on interest rate swaps | 1,710 | 2,689 |  | 2,525 |
Interest on finance leases | 2,974 | 2,917 |  | 3,186 |
Trade receivables securitization expense (Note 10) | 12,097 | 7,256 |  |  |
Other finance costs | 2,599 | 352 |  | 4,407 |
Finance costs | $ 62,022 | $ 65,412 | [1] | $ 30,251 | [1]
[1] | The amounts for 2016 have been re-presented to show the results of the Spanish energy business within profit (loss) from continuing operations, as described in Note 1 to the consolidated financial statements.

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