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EMPLOYEE BENEFIT PLANS (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
EMPLOYEE BENEFIT PLANS
Employer's contribution (as a percent)	20.00%us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent
Defined contributions schemes expense	$ 5,806,226us-gaap_DefinedContributionPlanCostRecognized	$ 4,740,434us-gaap_DefinedContributionPlanCostRecognized	$ 5,880,203us-gaap_DefinedContributionPlanCostRecognized
Percentage of applicable salaries contributed by the employer for medical insurance benefits	10.00%csiq_DefinedContributionPlanEmployerContributionAsPercentageOfApplicableSalariesForMedicalInsuranceBenefits
Percentage of applicable salaries contributed by the employer for housing funds	8.00%csiq_DefinedContributionPlanEmployerContributionAsPercentageOfApplicableSalariesForHousingFunds
Percentage of applicable salaries contributed by the employer for unemployment benefits	2.00%csiq_DefinedContributionPlanEmployerContributionAsPercentageOfApplicableSalariesForUnemploymentBenefits
Percentage of applicable salaries contributed by the employer for other statutory benefits	2.00%csiq_DefinedContributionPlanEmployerContributionAsPercentageOfApplicableSalariesForOtherStatutoryBenefits
Amount of contribution by the employer for medical insurance benefits, housing funds, unemployment and other statutory benefits	$ 5,980,338csiq_DefinedContributionPlanEmployerContributionAmount	$ 5,461,137csiq_DefinedContributionPlanEmployerContributionAmount	$ 6,012,889csiq_DefinedContributionPlanEmployerContributionAmount

X

- Definition

Represents the amount of contributions made by an employer to the medical insurance benefits, housing funds, unemployment and other statutory benefits of a defined contribution plan.

+ References

No definition available.

+ Details

Name:	csiq_DefinedContributionPlanEmployerContributionAmount
Namespace Prefix:	csiq_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Represents the percentage of employees' applicable salaries for which the employer contributes to the housing funds of a defined contribution plan.

+ References

No definition available.

+ Details

Name:	csiq_DefinedContributionPlanEmployerContributionAsPercentageOfApplicableSalariesForHousingFunds
Namespace Prefix:	csiq_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents the percentage of employees' applicable salaries for which the employer contributes to the medical insurance benefits of a defined contribution plan.

+ References

No definition available.

+ Details

Name:	csiq_DefinedContributionPlanEmployerContributionAsPercentageOfApplicableSalariesForMedicalInsuranceBenefits
Namespace Prefix:	csiq_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents the percentage of employees' applicable salaries for which the employer contributes to the other statutory benefits of a defined contribution plan.

+ References

No definition available.

+ Details

Name:	csiq_DefinedContributionPlanEmployerContributionAsPercentageOfApplicableSalariesForOtherStatutoryBenefits
Namespace Prefix:	csiq_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents the percentage of employees' applicable salaries for which the employer contributes to the unemployment benefits of a defined contribution plan.

+ References

No definition available.

+ Details

Name:	csiq_DefinedContributionPlanEmployerContributionAsPercentageOfApplicableSalariesForUnemploymentBenefits
Namespace Prefix:	csiq_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Details

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

X

- Definition

The amount of the cost recognized during the period for defined contribution plans.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 70

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6414718&loc=d3e28014-114942

+ Details

Name:	us-gaap_DefinedContributionPlanCostRecognized
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan.

+ References

No definition available.

+ Details

Name:	us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration