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SUMMARY OF PRINCIPAL ACCOUNTING POLICIES (Details 5) (USD $) | 0 Months Ended | 1 Months Ended | 12 Months Ended
--- | --- | --- | ---
Aug. 01, 2011 | May 31, 2009 | Jun. 30, 2009 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Warranty cost |  |  |  |  |  |
Guarantee of solar modules for defects in materials and engineering design, installation and construction |  | 2 years |  |  |  |
Minimum percentage of decline in initial minimum power generation capacity for 10 years |  | 10.00%csiq_SolarModulesMinimumPercentageOfDeclineInPowerGenerationCapacityToGetTenYearWarranty |  |  |  |
Minimum percentage of decline in initial minimum power generation capacity for 25 years |  | 20.00%csiq_SolarModulesMinimumPercentageOfDeclineInPowerGenerationCapacityToGetTwentyFiveYearWarranty |  |  |  |
Extended warranty of solar modules and products for defects in materials and workmanship | 10 years |  | 6 years |  |  |
Period for which the entity guarantees for maintaining the performance levels | 25 years |  |  |  |  |
Warranty accrual rate for sales of solar modules as a percentage of revenue |  |  |  | 1.00%csiq_ProductWarrantyAccrualRateForSalesOfSolarModules |  |
Term of insurance policy over which the insurance premium will be amortized |  |  |  | 1 year |  |
Unamortized carrying amount of insurance premium |  |  |  | $ 1,196,313 csiq_InsurancePremiumUnamortizedAmountNoncurrent | $ 1,082,500 csiq_InsurancePremiumUnamortizedAmountNoncurrent | $ 3,061,879 csiq_InsurancePremiumUnamortizedAmountNoncurrent
Term of warranty obligation over which the assets is expected to be realized |  |  |  | 25 years |  |
Insurance receivable |  |  |  | 43,401,623 us-gaap_InsuranceSettlementsReceivableNoncurrent | 27,942,735 us-gaap_InsuranceSettlementsReceivableNoncurrent |
Downward adjustment of warranty cost |  |  |  |  | 31,413,301 csiq_ProductWarrantyExpenseAdjustment |
Downward adjustment of other non-current assets |  |  |  |  | 17,691,653 csiq_OtherNoncurrentAssetsAdjustment |
Warranty costs (net effect of adjustment) included in cost of revenues |  |  |  | 18,569,972 us-gaap_ProductWarrantyExpense | (16,464,540)us-gaap_ProductWarrantyExpense | 12,516,349 us-gaap_ProductWarrantyExpense
Foreign currency risk |  |  |  |  |  |
Cash and cash equivalents and restricted cash denominated in RMB, USD equivalent |  |  |  | $ 574,530,687 csiq_CashAndCashEquivalentsAndRestrictedCashDenominatedInForeignCurrencyUSDEquivalent | $ 497,510,242 csiq_CashAndCashEquivalentsAndRestrictedCashDenominatedInForeignCurrencyUSDEquivalent | $ 491,288,121 csiq_CashAndCashEquivalentsAndRestrictedCashDenominatedInForeignCurrencyUSDEquivalent
Maximum |  |  |  |  |  |
Warranty cost |  |  |  |  |  |
Guarantee of solar modules for defects in materials and engineering design, installation and construction |  |  |  | 5 years |  |
Warranty period of solar modules and products against decline of more than 10% of initial power generation capacity |  | 10 years |  |  |  |
Warranty period of solar modules and products against decline of more than 20% of initial power generation capacity |  | 25 years |  |  |  |
First year of guaranteed performance period | Minimum |  |  |  |  |  |
Warranty cost |  |  |  |  |  |
Actual power output of module as a percentage of labeled power output |  |  |  | 97.00%csiq_ActualPowerOutputOfModuleAsPercentageOfLabeledPowerOutput / csiq_ProductWarrantyGuaranteedPerformancePeriodAxis = csiq_GuaranteedPerformanceForFirstYearMember / us-gaap_RangeAxis = us-gaap_MinimumMember |  |
Year 2 to year 24 of guaranteed performance period | Maximum |  |  |  |  |  |
Warranty cost |  |  |  |  |  |
Percentage of decline in actual annual power output of module |  |  |  | 0.70%csiq_PercentageOfDeclineInActualAnnualPowerOutputOfModule / csiq_ProductWarrantyGuaranteedPerformancePeriodAxis = csiq_GuaranteedPerformanceForYear2ToYear24Member / us-gaap_RangeAxis = us-gaap_MaximumMember |  |
Year 25 of guaranteed performance period | Minimum |  |  |  |  |  |
Warranty cost |  |  |  |  |  |
Actual power output of module as a percentage of labeled power output |  |  |  | 80.00%csiq_ActualPowerOutputOfModuleAsPercentageOfLabeledPowerOutput / csiq_ProductWarrantyGuaranteedPerformancePeriodAxis = csiq_GuaranteedPerformanceForYear25Member / us-gaap_RangeAxis = us-gaap_MinimumMember |  |

X
- Definition Represents the actual power output of module as a percentage of labeled power output. + References No definition available. + Details
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Namespace Prefix: | csiq_
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Balance Type: | na
Period Type: | duration

X
- Definition Represents the US dollar equivalent of cash, cash equivalents and restricted cash denominated in foreign currency. + References No definition available. + Details
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Namespace Prefix: | csiq_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition Represents the extended period of time over which the entity guarantees against defects in materials and workmanship. + References No definition available. + Details
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Namespace Prefix: | csiq_
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- Details
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- Definition Represents the term of the insurance policy over which the insurance premium will be amortized. + References No definition available. + Details
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Namespace Prefix: | csiq_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Represents the unamortized carrying amount of insurance premium. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition Represents the adjustment to the expense charged against earnings for the period pertaining to other non-current assets. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Represents the percentage of decline in actual annual power output of module. + References No definition available. + Details
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Namespace Prefix: | csiq_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the percentage of revenue which the entity uses as an estimate of warranty expense for sales of solar modules, which is included in cost of revenues. + References No definition available. + Details
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Namespace Prefix: | csiq_
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- Details
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- Definition Represents the adjustment to the expense charged against earnings for the period pertaining to standard and extended warranties on the entity's goods and services granted to customers. + References No definition available. + Details
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Balance Type: | credit
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- Definition Represents the period for which the entity guarantees for maintaining the performance levels. + References No definition available. + Details
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- Definition Represents the minimum percentage of decline in power generation capacity from the time of delivery which the entity warrants for a ten year period. + References No definition available. + Details
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Namespace Prefix: | csiq_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the minimum percentage of decline in power generation capacity from the time of delivery which the entity warrants for a 25 year period. + References No definition available. + Details
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Namespace Prefix: | csiq_
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Balance Type: | na
Period Type: | duration

X
- Definition Represents the warranty period of solar modules for decline of more than 10 percent of the initial minimum power generation capacity. + References No definition available. + Details
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Namespace Prefix: | csiq_
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- Definition Represents the warranty period of solar modules for decline of more than 20 percent of the initial minimum power generation capacity. + References No definition available. + Details
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X
- Definition Represents the period of time over which the entity guarantees against defects in materials and workmanship. + References No definition available. + Details
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Namespace Prefix: | csiq_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the term of warranty obligation over which the asset is expected to be realized. + References No definition available. + Details
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Namespace Prefix: | csiq_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Carrying amount due after one year of the balance sheet date (or one operating cycle, if longer) of amount due in settlement of a claim for reimbursement from an insurance company when the Company has suffered a loss covered under an insurance policy. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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Balance Type: | debit
Period Type: | instant

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- Definition The expense charged against earnings for the period pertaining to standard and extended warranties on the entity's goods and services granted to customers. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph ((c)(3,4)) -URI http://asc.fasb.org/extlink&oid=6398077&loc=d3e12565-110249 + Details
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- Details
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- Details
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- Details
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