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PROPERTY, PLANT AND EQUIPMENT, NET (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
PROPERTY, PLANT AND EQUIPMENT, NET
Property, plant and equipment, gross	$ 764,244,917us-gaap_PropertyPlantAndEquipmentGross	$ 681,451,452us-gaap_PropertyPlantAndEquipmentGross
Less: Accumulated depreciation	(349,315,817)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	(283,885,686)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
Impairment	(1,604,737)csiq_AccumulatedAssetImpairmentCharges	(3,675,254)csiq_AccumulatedAssetImpairmentCharges
Property, plant and equipment, excluding construction in process, net	413,324,363csiq_PropertyPlantAndEquipmentExcludingConstructionInProgressNet	393,890,512csiq_PropertyPlantAndEquipmentExcludingConstructionInProgressNet
Property, plant and equipment, net	469,349,209us-gaap_PropertyPlantAndEquipmentNet	407,604,979us-gaap_PropertyPlantAndEquipmentNet
Depreciation expense	81,068,252us-gaap_Depreciation	79,726,604us-gaap_Depreciation	80,644,322us-gaap_Depreciation
Buildings
PROPERTY, PLANT AND EQUIPMENT, NET
Property, plant and equipment, gross	182,888,575us-gaap_PropertyPlantAndEquipmentGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_BuildingMember	179,807,928us-gaap_PropertyPlantAndEquipmentGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_BuildingMember
Solar power systems
PROPERTY, PLANT AND EQUIPMENT, NET
Property, plant and equipment, gross	75,344,514us-gaap_PropertyPlantAndEquipmentGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = csiq_SolarPowerSystemsMember
Leasehold improvements
PROPERTY, PLANT AND EQUIPMENT, NET
Property, plant and equipment, gross	6,848,620us-gaap_PropertyPlantAndEquipmentGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_LeaseholdImprovementsMember	5,790,852us-gaap_PropertyPlantAndEquipmentGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_LeaseholdImprovementsMember
Machinery
PROPERTY, PLANT AND EQUIPMENT, NET
Property, plant and equipment, gross	459,271,771us-gaap_PropertyPlantAndEquipmentGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_MachineryAndEquipmentMember	456,349,087us-gaap_PropertyPlantAndEquipmentGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_MachineryAndEquipmentMember
Furniture, fixtures and equipment
PROPERTY, PLANT AND EQUIPMENT, NET
Property, plant and equipment, gross	36,526,271us-gaap_PropertyPlantAndEquipmentGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_FurnitureAndFixturesMember	36,549,260us-gaap_PropertyPlantAndEquipmentGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_FurnitureAndFixturesMember
Motor vehicles
PROPERTY, PLANT AND EQUIPMENT, NET
Property, plant and equipment, gross	3,365,166us-gaap_PropertyPlantAndEquipmentGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_VehiclesMember	2,954,325us-gaap_PropertyPlantAndEquipmentGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_VehiclesMember
Construction in process
PROPERTY, PLANT AND EQUIPMENT, NET
Property, plant and equipment, net	$ 56,024,846us-gaap_PropertyPlantAndEquipmentNet / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_ConstructionInProgressMember	$ 13,714,467us-gaap_PropertyPlantAndEquipmentNet / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_ConstructionInProgressMember

X

- Definition

Amount of accumulated asset impairment for physical assets used in the normal conduct of business to produce goods and services.

+ References

No definition available.

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X

- Definition

Represents the net amount of long-lived physical assets, excluding construction in process, used in the normal conduct of business and not intended for resale.

+ References

No definition available.

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- Definition

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229



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-Section S99

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

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-Paragraph 14

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- Definition

The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References

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-Name Accounting Standards Codification

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 50

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-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229



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