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FAIR VALUE MEASUREMENT - Interest rate swap (Details) - Not designated as hedging instruments - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Effect of fair value of derivative instruments on the consolidated balance sheets |  |
Total derivatives asset | $ 7,362 | $ 23,351
Total derivatives liability | 2,622 | 10,755
Derivative assets - current | Foreign exchange forward contracts |  |
Effect of fair value of derivative instruments on the consolidated balance sheets |  |
Total derivatives asset | 7,124 | 22,178
Derivative assets - current | Foreign exchange option contracts |  |
Effect of fair value of derivative instruments on the consolidated balance sheets |  |
Total derivatives asset | 162 | 1,173
Other non-current assets. | Interest rate swap |  |
Effect of fair value of derivative instruments on the consolidated balance sheets |  |
Total derivatives asset | 76 |
Derivative liabilities - current | Foreign exchange forward contracts |  |
Effect of fair value of derivative instruments on the consolidated balance sheets |  |
Total derivatives liability | $ 2,622 | 10,753
Derivative liabilities - current | Foreign exchange option contracts |  |
Effect of fair value of derivative instruments on the consolidated balance sheets |  |
Total derivatives liability |  | $ 2

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