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INCOME TAXES (Details 5) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Reconciliation between the provision for income tax computed by applying Canadian federal and provincial statutory tax rates to income before income taxes and the actual provision and benefit for income taxes
Combined federal and provincial income tax rate (as a percent)	27.00%csiq_EffectiveIncomeTaxRateReconciliationAtFederalAndProvincialIncomeTaxRate	27.00%csiq_EffectiveIncomeTaxRateReconciliationAtFederalAndProvincialIncomeTaxRate	27.00%csiq_EffectiveIncomeTaxRateReconciliationAtFederalAndProvincialIncomeTaxRate
Expenses not deductible for tax purpose (as a percent)			(1.00%)us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpense
Effect of different tax rate of subsidiary operations in other jurisdiction (as a percent)	(2.00%)us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	1.00%us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	(7.00%)us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential
Unrecognized tax benefits (as a percent)		5.00%us-gaap_EffectiveIncomeTaxRateReconciliationTaxContingencies	(1.00%)us-gaap_EffectiveIncomeTaxRateReconciliationTaxContingencies
Valuation allowance (as a percent)	(1.00%)us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	5.00%us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	(14.00%)us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance
Change of tax rates in subsequent years (as a percent)		(23.00%)us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate
Exchange gain (loss) (as a percent)			(1.00%)csiq_EffectiveIncomeTaxRateReconciliationForeignExchangeGainLoss
Actual income tax rate (as a percent)	24.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations	15.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations	3.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations
Additional disclosure
Withholding income tax rate on dividends distributed by foreign invested enterprises (as a percent)	10.00%csiq_WithholdingTaxRateOnDividendDistributedByForeignInvestmentEntities
Undistributed earnings of subsidiaries and affiliates considered to be permanently reinvested	$ 155,600,000us-gaap_UndistributedEarningsOfForeignSubsidiaries
Provision for withholding income tax on dividend	0csiq_ProvisionForWithholdingTaxOnDividendDistributedByForeignInvestmentEntities
Preferential withholding tax rate (as a percent)	5.00%csiq_PreferentialWithholdingTaxRate
Minimum
Additional disclosure
Unrecognized deferred tax liabilities	7,700,000us-gaap_DeferredTaxLiabilityNotRecognizedAmountOfUnrecognizedDeferredTaxLiabilityUndistributedEarningsOfForeignSubsidiaries / us-gaap_RangeAxis = us-gaap_MinimumMember
Withholding tax rate (as a percent)	5.00%csiq_WithholdingTaxRate / us-gaap_RangeAxis = us-gaap_MinimumMember
Maximum
Additional disclosure
Unrecognized deferred tax liabilities	$ 15,300,000us-gaap_DeferredTaxLiabilityNotRecognizedAmountOfUnrecognizedDeferredTaxLiabilityUndistributedEarningsOfForeignSubsidiaries / us-gaap_RangeAxis = us-gaap_MaximumMember
Withholding tax rate (as a percent)	10.00%csiq_WithholdingTaxRate / us-gaap_RangeAxis = us-gaap_MaximumMember

X

- Definition

The domestic federal statutory tax rate and provincial corporate income tax rate applicable under enacted tax laws to the Company's pretax income from continuing operations for the period. The "statutory" tax rate is the regular tax rate if there are alternative tax systems.

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The portion of the difference between the effective income tax rate and domestic federal statutory income tax rate attributable to foreign exchange gain (loss).

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Amount of deferred tax liability not recognized because of the exceptions to comprehensive recognition of deferred taxes related to undistributed earnings of foreign subsidiaries.

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the valuation allowance for deferred tax assets.

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Amount of undistributed earnings of foreign subsidiaries intended to be permanently reinvested outside the country of domicile.

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