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ACQUISITION (Details) (USD $)
0 Months Ended
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   16csiq_NumberOfSolarPowerProjectsAcquired
/ us-gaap_BusinessAcquisitionAxis
= csiq_AcquisitionOfProjects16Member
     
Power purchase contract period awarded to projects   20 years      
Number of contracts issued under Ontario's FIT program   15csiq_BusinessAcquisitionNumberOfContractsIssuedUnderProgramOne
/ us-gaap_BusinessAcquisitionAxis
= csiq_AcquisitionOfProjects16Member
     
Number of contracts issued as part of Ontario's Renewable Energy Standard Offer Program   1csiq_BusinessAcquisitionNumberOfContractsIssuedUnderProgramTwo
/ us-gaap_BusinessAcquisitionAxis
= csiq_AcquisitionOfProjects16Member
     
Total consideration paid          
Cash consideration $ 186,716,547us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= csiq_AcquisitionOfProjects16Member
       
Fair value of the issuance of warrant, net of cash received 7,774,990us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable
/ us-gaap_BusinessAcquisitionAxis
= csiq_AcquisitionOfProjects16Member
       
Total consideration paid 194,491,537us-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) $ 5.0us-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   190csiq_CapacityOfSolarProjectsAcquired
/ us-gaap_BusinessAcquisitionAxis
= csiq_AcquisitionOfProjects16Member
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
     
Projects 16 | Maximum          
ACQUISITION          
Capacity of solar power acquired   200csiq_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         2csiq_NumberOfSolarPowerProjectsAcquired
/ us-gaap_BusinessAcquisitionAxis
= csiq_AcquisitionOfSunEdisonProjectsMember
Capacity of solar power acquired     12csiq_CapacityOfSolarProjectsAcquired
/ us-gaap_BusinessAcquisitionAxis
= csiq_AcquisitionOfSunEdisonProjectsMember
10.5csiq_CapacityOfSolarProjectsAcquired
/ us-gaap_BusinessAcquisitionAxis
= csiq_AcquisitionOfSunEdisonProjectsMember
 
Total consideration paid          
Total consideration paid     $ 9,100,000us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_BusinessAcquisitionAxis
= csiq_AcquisitionOfSunEdisonProjectsMember
$ 8,800,000us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_BusinessAcquisitionAxis
= csiq_AcquisitionOfSunEdisonProjectsMember
$ 20,500,000us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_BusinessAcquisitionAxis
= csiq_AcquisitionOfSunEdisonProjectsMember