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BORROWINGS - Long term (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019
BORROWINGS |  |
Long-term borrowings on project assets - current | $ 198,794 | $ 286,173
Long-term borrowings | 446,090 | 619,477
Future principal repayment on the long-term borrowings loans |  |
2021 | 488,530 |
2022 | 275,985 |
2023 | 71,563 |
2024 | 18,785 |
2025 | 2,912 |
Thereafter | 76,845 |
Total | 934,620 |
Less: future principal repayment related to long-term borrowings, current portion | (488,530) |
Total long-term portion | $ 446,090 | $ 619,477
Minimum |  |
BORROWINGS |  |
Average interest rate on long-term borrowings (as a percent) | 1.70% |
Maximum |  |
BORROWINGS |  |
Average interest rate on long-term borrowings (as a percent) | 6.50% |

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