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Financial Statement Schedule I (Details 4) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Condensed Financial Statements |  |  |
Net revenues | $ 2,960,626,610 us-gaap_SalesRevenueNet | $ 1,654,356,064 us-gaap_SalesRevenueNet | $ 1,294,829,413 us-gaap_SalesRevenueNet
Cost of revenues | 2,379,633,234 us-gaap_CostOfGoodsAndServicesSold | 1,378,661,093 us-gaap_CostOfGoodsAndServicesSold | 1,204,467,983 us-gaap_CostOfGoodsAndServicesSold
Gross profit | 580,993,376 us-gaap_GrossProfit | 275,694,971 us-gaap_GrossProfit | 90,361,430 us-gaap_GrossProfit
Operating expenses: |  |  |
Selling expenses | 125,796,632 us-gaap_SellingExpense | 88,426,136 us-gaap_SellingExpense | 91,052,729 us-gaap_SellingExpense
General and administrative expenses | 76,826,038 us-gaap_GeneralAndAdministrativeExpense | 44,767,586 us-gaap_GeneralAndAdministrativeExpense | 128,826,340 us-gaap_GeneralAndAdministrativeExpense
Research and development expenses | 12,056,951 us-gaap_ResearchAndDevelopmentExpense | 11,684,993 us-gaap_ResearchAndDevelopmentExpense | 12,998,122 us-gaap_ResearchAndDevelopmentExpense
Total operating expenses | 214,679,621 us-gaap_OperatingExpenses | 144,878,715 us-gaap_OperatingExpenses | 232,877,191 us-gaap_OperatingExpenses
Income (loss) from operations | 366,313,755 us-gaap_OperatingIncomeLoss | 130,816,256 us-gaap_OperatingIncomeLoss | (142,515,761)us-gaap_OperatingIncomeLoss
Other income (expenses): |  |  |
Interest expense | (48,905,848)us-gaap_InterestExpense | (46,244,456)us-gaap_InterestExpense | (53,304,640)us-gaap_InterestExpense
Interest income | 14,361,107 us-gaap_InvestmentIncomeInterest | 11,972,758 us-gaap_InvestmentIncomeInterest | 13,359,962 us-gaap_InvestmentIncomeInterest
Foreign exchange loss | 32,218,686 us-gaap_ForeignCurrencyTransactionGainLossBeforeTax | 51,468,616 us-gaap_ForeignCurrencyTransactionGainLossBeforeTax | 10,707,889 us-gaap_ForeignCurrencyTransactionGainLossBeforeTax
Others | 1,623,087 us-gaap_OtherNonoperatingIncomeExpense | 427,560 us-gaap_OtherNonoperatingIncomeExpense |
Other income (expenses), net: | (45,484,104)us-gaap_NonoperatingIncomeExpense | (74,548,528)us-gaap_NonoperatingIncomeExpense | (56,103,440)us-gaap_NonoperatingIncomeExpense
Income (loss) before income taxes and equity in loss of unconsolidated investees | 320,829,651 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments | 56,267,728 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments | (198,619,201)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
Income tax expense | (77,430,913)us-gaap_IncomeTaxExpenseBenefit | (7,638,786)us-gaap_IncomeTaxExpenseBenefit | 5,433,410 us-gaap_IncomeTaxExpenseBenefit
Equity in loss (earnings) of unconsolidated investees | (487,346)csiq_IncomeLossFromEquityMethodInvestmentsNetOfTax | 3,064,006 csiq_IncomeLossFromEquityMethodInvestmentsNetOfTax | 1,969,306 csiq_IncomeLossFromEquityMethodInvestmentsNetOfTax
Net income (loss) attributable to Canadian Solar Inc. | 239,501,317 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | 31,659,276 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | (195,468,691)us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
Parent Company |  |  |
Condensed Financial Statements |  |  |
Net revenues | 15,899,641 us-gaap_SalesRevenueNet / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 11,802,218 us-gaap_SalesRevenueNet / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 111,414,327 us-gaap_SalesRevenueNet / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Cost of revenues | 4,401,056 us-gaap_CostOfGoodsAndServicesSold / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 5,282,597 us-gaap_CostOfGoodsAndServicesSold / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 80,190,744 us-gaap_CostOfGoodsAndServicesSold / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Gross profit | 11,498,585 us-gaap_GrossProfit / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 6,519,621 us-gaap_GrossProfit / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 31,223,583 us-gaap_GrossProfit / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Operating expenses: |  |  |
Selling expenses | 3,999,535 us-gaap_SellingExpense / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 3,520,618 us-gaap_SellingExpense / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 3,649,131 us-gaap_SellingExpense / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
General and administrative expenses | 8,331,139 us-gaap_GeneralAndAdministrativeExpense / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 5,724,288 us-gaap_GeneralAndAdministrativeExpense / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 11,955,578 us-gaap_GeneralAndAdministrativeExpense / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Research and development expenses | 415,857 us-gaap_ResearchAndDevelopmentExpense / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 714,980 us-gaap_ResearchAndDevelopmentExpense / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 764,145 us-gaap_ResearchAndDevelopmentExpense / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Total operating expenses | 12,746,531 us-gaap_OperatingExpenses / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 9,959,886 us-gaap_OperatingExpenses / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 16,368,854 us-gaap_OperatingExpenses / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Income (loss) from operations | (1,247,946)us-gaap_OperatingIncomeLoss / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (3,440,265)us-gaap_OperatingIncomeLoss / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 14,854,729 us-gaap_OperatingIncomeLoss / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Other income (expenses): |  |  |
Interest expense | (6,328,588)us-gaap_InterestExpense / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  | (255,502)us-gaap_InterestExpense / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Interest income | 10,369,290 us-gaap_InvestmentIncomeInterest / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 12,021,534 us-gaap_InvestmentIncomeInterest / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 1,559,207 us-gaap_InvestmentIncomeInterest / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Foreign exchange loss | 5,335,145 us-gaap_ForeignCurrencyTransactionGainLossBeforeTax / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 8,454,989 us-gaap_ForeignCurrencyTransactionGainLossBeforeTax / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 622,816 us-gaap_ForeignCurrencyTransactionGainLossBeforeTax / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Others | 47,092 us-gaap_OtherNonoperatingIncomeExpense / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 427,560 us-gaap_OtherNonoperatingIncomeExpense / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |
Other income (expenses), net: | (1,247,351)us-gaap_NonoperatingIncomeExpense / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 3,994,105 us-gaap_NonoperatingIncomeExpense / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 680,889 us-gaap_NonoperatingIncomeExpense / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Income (loss) before income taxes and equity in loss of unconsolidated investees | (2,495,297)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 553,840 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 15,535,618 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Income tax expense | (1,006,201)us-gaap_IncomeTaxExpenseBenefit / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (1,275,114)us-gaap_IncomeTaxExpenseBenefit / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (7,441,590)us-gaap_IncomeTaxExpenseBenefit / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Equity in earnings (loss) of subsidiaries | 243,283,097 us-gaap_IncomeLossFromEquityMethodInvestments / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 35,132,523 us-gaap_IncomeLossFromEquityMethodInvestments / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (202,699,044)us-gaap_IncomeLossFromEquityMethodInvestments / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Equity in loss (earnings) of unconsolidated investees | 280,282 csiq_IncomeLossFromEquityMethodInvestmentsNetOfTax / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 2,751,973 csiq_IncomeLossFromEquityMethodInvestmentsNetOfTax / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 863,675 csiq_IncomeLossFromEquityMethodInvestmentsNetOfTax / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Net income (loss) attributable to Canadian Solar Inc. | $ 239,501,317 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | $ 31,659,276 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | $ (195,468,691)us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic / dei_LegalEntityAxis = us-gaap_ParentCompanyMember

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