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INVESTMENTS IN AFFILIATES - Other investments (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2024 USD ($) director shares | Dec. 31, 2023 USD ($) director shares | Dec. 31, 2022 USD ($)
Other investments |  |  |
Total board members | director | 5 | 1 |
Equity in earnings (losses) of affiliates | $ (12,136) | $ 14,610 | $ 15,440
Canadian Solar Infrastructure Fund, Inc. |  |  |
Other investments |  |  |
Number of units held | shares | 65,672 | 65,672 |
Suzhou Financial Leasing Co., Ltd. |  |  |
Other investments |  |  |
Ownership percentage | 3.00% | 3.00% |
Suzhou Financial Leasing Co., Ltd. | CSI Solar Co., Ltd. |  |  |
Other investments |  |  |
Ownership percentage | 3.00% | 3.00% |
Lingang Frontier (Yangzhou) CSI New Energy Investment Fund, LP |  |  |
Other investments |  |  |
Ownership percentage | 44.90% | 44.30% |
Lingang Frontier (Yangzhou) CSI New Energy Investment Fund, LP | CSI Solar Co., Ltd. |  |  |
Other investments |  |  |
Ownership percentage | 44.90% | 44.30% |
Marangatu Holding S.A. |  |  |
Other investments |  |  |
Ownership percentage | 30.00% | 30.00% | 30.00%
Gain on sale of interest in affiliates |  |  | $ 12,007
Net assets derecognized |  |  | $ 6,267
Panati Holding S.A. |  |  |
Other investments |  |  |
Ownership percentage | 30.00% | 30.00% | 30.00%
Gain on sale of interest in affiliates |  |  | $ 2,259
Net assets derecognized |  |  | $ 2,262

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