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SUMMARY OF PRINCIPAL ACCOUNTING POLICIES (Details 3) | 12 Months Ended
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Dec. 31, 2012
Prepaid land use right |
Period over which land use rights are charged to earnings | 50 years
Power purchase agreement |
Intangible assets |
Amortization period | 20 years
Technical know-how |
Intangible assets |
Amortization period | 10 years
Computer software | Minimum |
Intangible assets |
Amortization period | 1 year
Computer software | Maximum |
Intangible assets |
Amortization period | 10 years

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- Definition Represents the period over which land use rights are charged to earnings in accordance with the term of the land use right agreement. + References No definition available. + Details
Name: | csiq_LandUseRightTerm
Namespace Prefix: | csiq_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | csiq_PrepaymentForLandUseRightsAbstract
Namespace Prefix: | csiq_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_FiniteLivedIntangibleAssetUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration