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COMMITMENTS AND CONTINGENCIES (Tables) | 12 Months Ended
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Dec. 31, 2020
Property, plant and equipment |
Schedule of payment for commitments | ​
​ | ​ | ​
Year Ending December 31: |  | $
2021 |  | 174,509
2022 | ​ | 84,795
2023 | ​ | 45,408
Total | ​ | 304,712

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- Definition Tabular disclosure of key provisions of an arrangement under which the entity has agreed to purchase goods or services over a period of time greater than one year or the normal operating cycle, if longer, including the item for which expenditures will be made, minimum quantities, milestones, time period and committed amount. + References No definition available. + Details
Name: | us-gaap_LongTermPurchaseCommitmentTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_PurchaseCommitmentExcludingLongtermCommitmentAxis=csiq_PropertyAndEquipmentPurchaseCommitmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |