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ACQUISITION (Details) (USD $) | 0 Months Ended
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Jun. 15, 2012 | Apr. 17, 2012 item | Jun. 28, 2013 | Feb. 08, 2013 | Dec. 26, 2012
Projects 16 |  |  |  |  |
ACQUISITION |  |  |  |  |
Percentage of interest acquired |  | 97.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / us-gaap_BusinessAcquisitionAxis = csiq_AcquisitionOfProjects16Member |  |  |
Number of solar power projects acquired in each project company acquired |  | 16 csiq_NumberOfSolarPowerProjectsAcquired / us-gaap_BusinessAcquisitionAxis = csiq_AcquisitionOfProjects16Member |  |  |
Power purchase contract period awarded to projects |  | 20 years |  |  |
Number of contracts issued under Ontario's FIT program |  | 15 csiq_BusinessAcquisitionNumberOfContractsIssuedUnderProgramOne / us-gaap_BusinessAcquisitionAxis = csiq_AcquisitionOfProjects16Member |  |  |
Number of contracts issued as part of Ontario's Renewable Energy Standard Offer Program |  | 1 csiq_BusinessAcquisitionNumberOfContractsIssuedUnderProgramTwo / us-gaap_BusinessAcquisitionAxis = csiq_AcquisitionOfProjects16Member |  |  |
Total consideration paid |  |  |  |  |
Cash consideration | $ 186,716,547 us-gaap_PaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = csiq_AcquisitionOfProjects16Member |  |  |  |
Fair value of the issuance of warrant, net of cash received | 7,774,990 us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable / us-gaap_BusinessAcquisitionAxis = csiq_AcquisitionOfProjects16Member |  |  |  |
Total consideration paid | 194,491,537 us-gaap_BusinessCombinationConsiderationTransferred1 / us-gaap_BusinessAcquisitionAxis = csiq_AcquisitionOfProjects16Member |  |  |  |
Warrants issued to seller as percentage of reporting entity's outstanding common shares | 9.90%csiq_WarrantsIssuedToSellerAsPercentageOfOutstandingCommonSharesOfReportingEntity / us-gaap_BusinessAcquisitionAxis = csiq_AcquisitionOfProjects16Member |  |  |  |
Period during which warrants will not be exercisable | 1 year |  |  |  |
Exercise price of warrant (in dollars per share) | $ 5.0 us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 / us-gaap_BusinessAcquisitionAxis = csiq_AcquisitionOfProjects16Member |  |  |  |
Assumptions used to determine fair market value of warrants |  |  |  |  |
Percentage of non-voting tracking shares that would be redeemable by the Company upon satisfaction of certain conditions | 97.00%csiq_PercentageOfNonvotingTrackingSharesThatWouldBeRedeemableByTheEntityUponSatisfactionOfCertainConditions / us-gaap_BusinessAcquisitionAxis = csiq_AcquisitionOfProjects16Member |  |  |  |
Projects 16 | Minimum |  |  |  |  |
ACQUISITION |  |  |  |  |
Capacity of solar power acquired |  | 190 csiq_CapacityOfSolarProjectsAcquired / us-gaap_BusinessAcquisitionAxis = csiq_AcquisitionOfProjects16Member / us-gaap_RangeAxis = us-gaap_MinimumMember |  |  |
Projects 16 | Maximum |  |  |  |  |
ACQUISITION |  |  |  |  |
Capacity of solar power acquired |  | 200 csiq_CapacityOfSolarProjectsAcquired / us-gaap_BusinessAcquisitionAxis = csiq_AcquisitionOfProjects16Member / us-gaap_RangeAxis = us-gaap_MaximumMember |  |  |
Projects 16 | Warrants issued in acquisition |  |  |  |  |
Assumptions used to determine fair market value of warrants |  |  |  |  |
Risk free rate (as a percent) | 1.76%csiq_FairValueAssumptionsRiskFreeRate / us-gaap_BusinessAcquisitionAxis = csiq_AcquisitionOfProjects16Member / us-gaap_ShareholdersEquityClassAxis = us-gaap_EquityIssuedInBusinessCombinationMember |  |  |  |
Volatility ratio (as a percent) | 93.50%us-gaap_FairValueAssumptionsExpectedVolatilityRate / us-gaap_BusinessAcquisitionAxis = csiq_AcquisitionOfProjects16Member / us-gaap_ShareholdersEquityClassAxis = us-gaap_EquityIssuedInBusinessCombinationMember |  |  |  |
Acquisition of SunEdison Projects |  |  |  |  |
ACQUISITION |  |  |  |  |
Percentage of interest acquired |  |  | 100.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / us-gaap_BusinessAcquisitionAxis = csiq_AcquisitionOfSunEdisonProjectsMember | 100.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / us-gaap_BusinessAcquisitionAxis = csiq_AcquisitionOfSunEdisonProjectsMember | 100.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / us-gaap_BusinessAcquisitionAxis = csiq_AcquisitionOfSunEdisonProjectsMember
Number of solar power projects acquired in each project company acquired |  |  |  |  | 2 csiq_NumberOfSolarPowerProjectsAcquired / us-gaap_BusinessAcquisitionAxis = csiq_AcquisitionOfSunEdisonProjectsMember
Capacity of solar power acquired |  |  | 12 csiq_CapacityOfSolarProjectsAcquired / us-gaap_BusinessAcquisitionAxis = csiq_AcquisitionOfSunEdisonProjectsMember | 10.5 csiq_CapacityOfSolarProjectsAcquired / us-gaap_BusinessAcquisitionAxis = csiq_AcquisitionOfSunEdisonProjectsMember |
Total consideration paid |  |  |  |  |
Total consideration paid |  |  | $ 9,100,000 us-gaap_BusinessCombinationConsiderationTransferred1 / us-gaap_BusinessAcquisitionAxis = csiq_AcquisitionOfSunEdisonProjectsMember | $ 8,800,000 us-gaap_BusinessCombinationConsiderationTransferred1 / us-gaap_BusinessAcquisitionAxis = csiq_AcquisitionOfSunEdisonProjectsMember | $ 20,500,000 us-gaap_BusinessCombinationConsiderationTransferred1 / us-gaap_BusinessAcquisitionAxis = csiq_AcquisitionOfSunEdisonProjectsMember

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