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INVESTMENTS IN AFFILIATES (Details) (USD $) | Dec. 31, 2014 | Dec. 31, 2013 | May 23, 2012
--- | --- | --- | ---
Investments in affiliates |  |  |
Carrying Value | $ 38,822,784 us-gaap_EquityMethodInvestments | $ 34,070,488 us-gaap_EquityMethodInvestments |
Gaochuangte |  |  |
Investments in affiliates |  |  |
Carrying Value | 7,112,103 us-gaap_EquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = csiq_SuzhouGaochuangteNewEnergyCoLtdMember | 7,123,976 us-gaap_EquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = csiq_SuzhouGaochuangteNewEnergyCoLtdMember |
Ownership Percentage | 40.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = csiq_SuzhouGaochuangteNewEnergyCoLtdMember | 40.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = csiq_SuzhouGaochuangteNewEnergyCoLtdMember |
CSI Skypower |  |  |
Investments in affiliates |  |  |
Carrying Value | 3,532,851 us-gaap_EquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = csiq_CSISkyPowerMember | 3,813,133 us-gaap_EquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = csiq_CSISkyPowerMember |
Ownership Percentage | 50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = csiq_CSISkyPowerMember | 50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = csiq_CSISkyPowerMember | 50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = csiq_CSISkyPowerMember
GCL-CSI (Suzhou) Photovoltaic Technology Co., Ltd. |  |  |
Investments in affiliates |  |  |
Carrying Value | 3,310,861 us-gaap_EquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = csiq_GCLCSISuzhouPhotovoltaicTechnologyCoLtdMember | 2,584,143 us-gaap_EquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = csiq_GCLCSISuzhouPhotovoltaicTechnologyCoLtdMember |
Ownership Percentage | 10.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = csiq_GCLCSISuzhouPhotovoltaicTechnologyCoLtdMember | 10.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = csiq_GCLCSISuzhouPhotovoltaicTechnologyCoLtdMember |
Foto Light LP |  |  |
Investments in affiliates |  |  |
Carrying Value | 2,389,722 us-gaap_EquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = csiq_FotoLightLPMember |  |
Ownership Percentage | 5.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = csiq_FotoLightLPMember |  |
Discovery Light |  |  |
Investments in affiliates |  |  |
Carrying Value | 2,125,176 us-gaap_EquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = csiq_DiscoveryLightLPMember |  |
Ownership Percentage | 5.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = csiq_DiscoveryLightLPMember |  |
Others |  |  |
Investments in affiliates |  |  |
Carrying Value | $ 20,352,071 us-gaap_EquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = csiq_OtherEquityMethodInvesteesMember | $ 20,549,236 us-gaap_EquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = csiq_OtherEquityMethodInvesteesMember |
Others | Minimum |  |  |
Investments in affiliates |  |  |
Ownership Percentage | 21.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = csiq_OtherEquityMethodInvesteesMember | 21.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = csiq_OtherEquityMethodInvesteesMember |
Others | Maximum |  |  |
Investments in affiliates |  |  |
Ownership Percentage | 50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = csiq_OtherEquityMethodInvesteesMember | 50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = csiq_OtherEquityMethodInvesteesMember |

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