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Disclosures on reserves in Equity (Details 3) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Disclosure of Disclosures on equity [Line Items] |  |  |
Opening balance | $ (14,223) | $ (14,999) | $ (14,349)
Increase in reserves | 30,846 | 12,008 | 22,092
Decrease in Reserve | (9,191) | (11,232) | (22,742)
Closing balance | 7,432 | (14,223) | (14,999)
Reserve of change in value of foreign currency basis spreads [member] |  |  |
Disclosure of Disclosures on equity [Line Items] |  |  |
Opening balance | (25,745) | (26,307) | (24,913)
Increase in reserves | 15,732 | 1,824 | 6,542
Decrease in Reserve | (1,556) | (1,262) | (7,936)
Closing balance | (11,569) | (25,745) | (26,307)
Gains from cash flow hedge before tax [Member] |  |  |
Disclosure of Disclosures on equity [Line Items] |  |  |
Opening balance | 9,879 | 7,971 | 2,248
Increase in reserves | 0 | 8,628 | 14,794
Decrease in Reserve | (3,706) | (6,720) | (9,071)
Closing balance | 6,173 | 9,879 | 7,971
Gains from cash flow hedge tax [Member] |  |  |
Disclosure of Disclosures on equity [Line Items] |  |  |
Opening balance | (2,683) | 0 | 0
Increase in reserves | 0 | (2,683) | 0
Decrease in Reserve | 1,001 | 0 | 0
Closing balance | (1,682) | (2,683) | 0
Losses from measurement of defined benefit plans before tax [Member] |  |  |
Disclosure of Disclosures on equity [Line Items] |  |  |
Opening balance | (11,482) | (8,176) | (6,847)
Increase in reserves | 3,858 | 0 | 674
Decrease in Reserve | (2,903) | (3,306) | (2,003)
Closing balance | (10,527) | (11,482) | (8,176)
Losses from measurement of defined benefit plans tax [Member] |  |  |
Disclosure of Disclosures on equity [Line Items] |  |  |
Opening balance | 1,992 | 1,292 | 894
Increase in reserves | 430 | 0 | (133)
Decrease in Reserve | (575) | 700 | 531
Closing balance | 1,847 | 1,992 | 1,292
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 | 392 | (760) | 4,787
Increase in reserves | 11,885 | 1,570 | 294
Decrease in Reserve | (2,101) | (418) | (5,841)
Closing balance | 10,176 | 392 | (760)
Gains (losses) from financial assets measured at fair value through other comprehensive income tax [Member] |  |  |
Disclosure of Disclosures on equity [Line Items] |  |  |
Opening balance | (662) | (351) | (1,850)
Increase in reserves | (3,180) | (424) | (79)
Decrease in Reserve | 538 | 113 | 1,578
Closing balance | (3,304) | (662) | (351)
Miscellaneous other reserves before tax [Member] |  |  |
Disclosure of Disclosures on equity [Line Items] |  |  |
Opening balance | 14,086 | 11,332 | 11,332
Increase in reserves | 2,121 | 3,093 | 0
Decrease in Reserve | 111 | (339) | 0
Closing balance | 16,318 | 14,086 | 11,332
Total reserves, reserves before tax [Member] |  |  |
Disclosure of Disclosures on equity [Line Items] |  |  |
Opening balance | (12,870) | (15,940) | (13,393)
Increase in reserves | 33,596 | 15,115 | 22,304
Decrease in Reserve | (10,155) | (12,045) | (24,851)
Closing balance | 10,571 | (12,870) | (15,940)
Total reserves, reserves defered tax [Member] |  |  |
Disclosure of Disclosures on equity [Line Items] |  |  |
Opening balance | (1,353) | 941 | (956)
Increase in reserves | (2,750) | (3,107) | (212)
Decrease in Reserve | 964 | 813 | 2,109
Closing balance | $ (3,139) | $ (1,353) | $ 941

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