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SUMMARY OF PRINCIPAL ACCOUNTING POLICIES (Details 2) (USD $) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2014 | Dec. 31, 2014
Project assets |  |
Project assets reclassified to property, plant and equipment | $ 98,014,070 csiq_ProjectAssetsReclassifiedToPropertyPlantAndEquipment |
Property, plant and equipment |  |
Estimated useful lives |  | 20 years
Buildings |  |
Property, plant and equipment |  |
Estimated useful lives |  | 20 years
Machinery | Minimum |  |
Property, plant and equipment |  |
Estimated useful lives |  | 5 years
Machinery | Maximum |  |
Property, plant and equipment |  |
Estimated useful lives |  | 10 years
Furniture, fixtures and equipment |  |
Property, plant and equipment |  |
Estimated useful lives |  | 5 years
Motor vehicles |  |
Property, plant and equipment |  |
Estimated useful lives |  | 5 years
Solar power systems |  |
Property, plant and equipment |  |
Estimated useful lives |  | 20 years

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

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- Definition Represents the amount of project assets reclassified to property, plant and equipment. + References No definition available. + Details
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Namespace Prefix: | csiq_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Details
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- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
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Data Type: | xbrli:durationItemType
Balance Type: | na
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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_MachineryAndEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_VehiclesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |