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

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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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.14) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 14 -Article 5 + Details
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