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SUMMARY OF PRINCIPAL ACCOUNTING POLICIES (Details 3)	12 Months Ended
	Dec. 31, 2014
Prepaid land use right
Period over which land use rights are charged to earnings	50 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

X

- 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

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Namespace Prefix:	csiq_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

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- Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
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- Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- 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

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- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_DevelopedTechnologyRightsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: