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Disclosures on reserves in Equity (Details 3) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Disclosure of Disclosures on equity [Line Items] |  |  |
Opening balance | $ (14,999) | $ (14,349) | $ (12,888)
Increase in reserves | 12,008 | 22,092 | 16,434
Decrease in Reserve | (11,232) | (22,742) | (17,895)
Closing balance | (14,223) | (14,999) | (14,349)
Reserve of change in value of foreign currency basis spreads [member] |  |  |
Disclosure of Disclosures on equity [Line Items] |  |  |
Opening balance | (26,307) | (24,913) | (19,463)
Increase in reserves | 1,824 | 6,542 | 1,992
Decrease in Reserve | (1,262) | (7,936) | (7,442)
Closing balance | (25,745) | (26,307) | (24,913)
Gains from cash flow hedge before tax [Member] |  |  |
Disclosure of Disclosures on equity [Line Items] |  |  |
Opening balance | 7,971 | 2,248 | 64
Increase in reserves | 8,628 | 14,794 | 4,068
Decrease in Reserve | (6,720) | (9,071) | (1,884)
Closing balance | 9,879 | 7,971 | 2,248
Gains from cash flow hedge tax [Member] |  |  |
Disclosure of Disclosures on equity [Line Items] |  |  |
Opening balance | 0 | 0 | 0
Increase in reserves | (2,683) | 0 | 0
Decrease in Reserve | 0 | 0 | 0
Closing balance | (2,683) | 0 | 0
Losses from measurement of defined benefit plans before tax [Member] |  |  |
Disclosure of Disclosures on equity [Line Items] |  |  |
Opening balance | (8,176) | (6,847) | (5,446)
Increase in reserves | 0 | 674 | 1,092
Decrease in Reserve | (3,306) | (2,003) | (2,493)
Closing balance | (11,482) | (8,176) | (6,847)
Losses from measurement of defined benefit plans tax [Member] |  |  |
Disclosure of Disclosures on equity [Line Items] |  |  |
Opening balance | 1,292 | 894 | 612
Increase in reserves | 0 | (133) | (308)
Decrease in Reserve | 700 | 531 | 590
Closing balance | 1,992 | 1,292 | 894
Gains (losses) from financial assets measured at fair value through other comprehensive income before tax [Member] |  |  |
Disclosure of Disclosures on equity [Line Items] |  |  |
Opening balance | (760) | 4,787 | 4,813
Increase in reserves | 1,570 | 294 | 6,090
Decrease in Reserve | (418) | (5,841) | (6,116)
Closing balance | 392 | (760) | 4,787
Gains (losses) from financial assets measured at fair value through other comprehensive income tax [Member] |  |  |
Disclosure of Disclosures on equity [Line Items] |  |  |
Opening balance | (351) | (1,850) | (1,300)
Increase in reserves | (424) | (79) | 0
Decrease in Reserve | 113 | 1,578 | (550)
Closing balance | (662) | (351) | (1,850)
Miscellaneous other reserves before tax [Member] |  |  |
Disclosure of Disclosures on equity [Line Items] |  |  |
Opening balance | 11,332 | 11,332 | 7,832
Increase in reserves | 3,093 | 0 | 3,500
Decrease in Reserve | (339) | 0 | 0
Closing balance | 14,086 | 11,332 | 11,332
Total reserves, reserves before tax [Member] |  |  |
Disclosure of Disclosures on equity [Line Items] |  |  |
Opening balance | (15,940) | (13,393) | (12,200)
Increase in reserves | 15,115 | 22,304 | 16,742
Decrease in Reserve | (12,045) | (24,851) | (17,935)
Closing balance | (12,870) | (15,940) | (13,393)
Total reserves, reserves defered tax [Member] |  |  |
Disclosure of Disclosures on equity [Line Items] |  |  |
Opening balance | 941 | (956) | (688)
Increase in reserves | (3,107) | (212) | (308)
Decrease in Reserve | 813 | 2,109 | 40
Closing balance | $ (1,353) | $ 941 | $ (956)

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