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(LOSSES) GAINS ON DERIVATIVE INSTRUMENTS AND OTHER FINANCIAL ITEMS, NET (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Other financial items, net: |  |  |
Losses on derivative instruments | $ (52,423) | $ (38,044) | $ (30,541)
Foreign exchange loss on operations | (3,221) | (902) | (1,997)
Financing arrangement fees and other costs | (2,138) | (5,735) | (244)
Amortization of debt guarantee (note 25) | 4,111 | 1,242 | 861
Other | (304) | (127) | (101)
Other financial items | (1,552) | (5,522) | (1,481)
Interest rate swap |  |  |
Other financial items, net: |  |  |
Losses on derivative instruments | (38,601) | (16,485) | 604
Interest (expense)/income on undesignated interest rate swaps (note 24) | (6,215) | 6,351 | 8,069
Equity Contract |  |  |
Other financial items, net: |  |  |
Losses on derivative instruments | (5,051) | (30,478) | (30,663)
Currency swap |  |  |
Other financial items, net: |  |  |
Losses on derivative instruments | (2,556) | 2,568 | (1,151)
Earn-Out Units |  |  |
Other financial items, net: |  |  |
Losses on derivative instruments | $ 0 | $ 0 | $ (7,400)

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