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ALLOWANCE FOR DOUBTFUL ACCOUNTS (Details) (USD $) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Movement of allowances |  |  |
Closing balance |  | $ 13,000,601 us-gaap_ValuationAllowancesAndReservesBalance | $ 11,242,208 us-gaap_ValuationAllowancesAndReservesBalance
Allowances for accounts receivable |  |  |
Movement of allowances |  |  |
Beginning of the year | 38,482,827 us-gaap_ValuationAllowancesAndReservesBalance / us-gaap_ValuationAllowancesAndReservesTypeAxis = us-gaap_AllowanceForTradeReceivablesMember | 47,582,217 us-gaap_ValuationAllowancesAndReservesBalance / us-gaap_ValuationAllowancesAndReservesTypeAxis = us-gaap_AllowanceForTradeReceivablesMember | 9,505,481 us-gaap_ValuationAllowancesAndReservesBalance / us-gaap_ValuationAllowancesAndReservesTypeAxis = us-gaap_AllowanceForTradeReceivablesMember
Allowances made (reversed) during the year, net | (5,843,084)csiq_ValuationAllowancesAndReservesChargedToCostAndExpenseAndRecoveriesNet / us-gaap_ValuationAllowancesAndReservesTypeAxis = us-gaap_AllowanceForTradeReceivablesMember | (1,897,423)csiq_ValuationAllowancesAndReservesChargedToCostAndExpenseAndRecoveriesNet / us-gaap_ValuationAllowancesAndReservesTypeAxis = us-gaap_AllowanceForTradeReceivablesMember | 43,240,595 csiq_ValuationAllowancesAndReservesChargedToCostAndExpenseAndRecoveriesNet / us-gaap_ValuationAllowancesAndReservesTypeAxis = us-gaap_AllowanceForTradeReceivablesMember
Accounts written-off against allowances | (8,677)us-gaap_ValuationAllowancesAndReservesDeductions / us-gaap_ValuationAllowancesAndReservesTypeAxis = us-gaap_AllowanceForTradeReceivablesMember | (7,877,676)us-gaap_ValuationAllowancesAndReservesDeductions / us-gaap_ValuationAllowancesAndReservesTypeAxis = us-gaap_AllowanceForTradeReceivablesMember | (5,325,908)us-gaap_ValuationAllowancesAndReservesDeductions / us-gaap_ValuationAllowancesAndReservesTypeAxis = us-gaap_AllowanceForTradeReceivablesMember
Foreign exchange effect | (814,166)csiq_ValuationAllowancesAndReservesForeignExchangeEffect / us-gaap_ValuationAllowancesAndReservesTypeAxis = us-gaap_AllowanceForTradeReceivablesMember | 675,709 csiq_ValuationAllowancesAndReservesForeignExchangeEffect / us-gaap_ValuationAllowancesAndReservesTypeAxis = us-gaap_AllowanceForTradeReceivablesMember | 162,049 csiq_ValuationAllowancesAndReservesForeignExchangeEffect / us-gaap_ValuationAllowancesAndReservesTypeAxis = us-gaap_AllowanceForTradeReceivablesMember
Closing balance | 31,816,900 us-gaap_ValuationAllowancesAndReservesBalance / us-gaap_ValuationAllowancesAndReservesTypeAxis = us-gaap_AllowanceForTradeReceivablesMember | 38,482,827 us-gaap_ValuationAllowancesAndReservesBalance / us-gaap_ValuationAllowancesAndReservesTypeAxis = us-gaap_AllowanceForTradeReceivablesMember | 47,582,217 us-gaap_ValuationAllowancesAndReservesBalance / us-gaap_ValuationAllowancesAndReservesTypeAxis = us-gaap_AllowanceForTradeReceivablesMember
Allowances for advances to suppliers |  |  |
Movement of allowances |  |  |
Beginning of the year | 40,046,830 us-gaap_ValuationAllowancesAndReservesBalance / us-gaap_ValuationAllowancesAndReservesTypeAxis = csiq_AllowanceForAdvancesToSuppliersMember | 38,545,487 us-gaap_ValuationAllowancesAndReservesBalance / us-gaap_ValuationAllowancesAndReservesTypeAxis = csiq_AllowanceForAdvancesToSuppliersMember | 38,123,721 us-gaap_ValuationAllowancesAndReservesBalance / us-gaap_ValuationAllowancesAndReservesTypeAxis = csiq_AllowanceForAdvancesToSuppliersMember
Allowances made (reversed) during the year, net | 4,349 csiq_ValuationAllowancesAndReservesChargedToCostAndExpenseAndRecoveriesNet / us-gaap_ValuationAllowancesAndReservesTypeAxis = csiq_AllowanceForAdvancesToSuppliersMember | 855,066 csiq_ValuationAllowancesAndReservesChargedToCostAndExpenseAndRecoveriesNet / us-gaap_ValuationAllowancesAndReservesTypeAxis = csiq_AllowanceForAdvancesToSuppliersMember | 370,622 csiq_ValuationAllowancesAndReservesChargedToCostAndExpenseAndRecoveriesNet / us-gaap_ValuationAllowancesAndReservesTypeAxis = csiq_AllowanceForAdvancesToSuppliersMember
Foreign exchange effect | (2,315,751)csiq_ValuationAllowancesAndReservesForeignExchangeEffect / us-gaap_ValuationAllowancesAndReservesTypeAxis = csiq_AllowanceForAdvancesToSuppliersMember | 646,277 csiq_ValuationAllowancesAndReservesForeignExchangeEffect / us-gaap_ValuationAllowancesAndReservesTypeAxis = csiq_AllowanceForAdvancesToSuppliersMember | 51,144 csiq_ValuationAllowancesAndReservesForeignExchangeEffect / us-gaap_ValuationAllowancesAndReservesTypeAxis = csiq_AllowanceForAdvancesToSuppliersMember
Closing balance | 37,735,428 us-gaap_ValuationAllowancesAndReservesBalance / us-gaap_ValuationAllowancesAndReservesTypeAxis = csiq_AllowanceForAdvancesToSuppliersMember | 40,046,830 us-gaap_ValuationAllowancesAndReservesBalance / us-gaap_ValuationAllowancesAndReservesTypeAxis = csiq_AllowanceForAdvancesToSuppliersMember | 38,545,487 us-gaap_ValuationAllowancesAndReservesBalance / us-gaap_ValuationAllowancesAndReservesTypeAxis = csiq_AllowanceForAdvancesToSuppliersMember
Allowances for other receivables |  |  |
Movement of allowances |  |  |
Beginning of the year | 887,024 us-gaap_ValuationAllowancesAndReservesBalance / us-gaap_ValuationAllowancesAndReservesTypeAxis = csiq_AllowanceForOtherReceivablesMember | 756,062 us-gaap_ValuationAllowancesAndReservesBalance / us-gaap_ValuationAllowancesAndReservesTypeAxis = csiq_AllowanceForOtherReceivablesMember |
Allowances made (reversed) during the year, net | (52,671)csiq_ValuationAllowancesAndReservesChargedToCostAndExpenseAndRecoveriesNet / us-gaap_ValuationAllowancesAndReservesTypeAxis = csiq_AllowanceForOtherReceivablesMember | 107,533 csiq_ValuationAllowancesAndReservesChargedToCostAndExpenseAndRecoveriesNet / us-gaap_ValuationAllowancesAndReservesTypeAxis = csiq_AllowanceForOtherReceivablesMember | 752,928 csiq_ValuationAllowancesAndReservesChargedToCostAndExpenseAndRecoveriesNet / us-gaap_ValuationAllowancesAndReservesTypeAxis = csiq_AllowanceForOtherReceivablesMember
Foreign exchange effect | (4,751)csiq_ValuationAllowancesAndReservesForeignExchangeEffect / us-gaap_ValuationAllowancesAndReservesTypeAxis = csiq_AllowanceForOtherReceivablesMember | 23,429 csiq_ValuationAllowancesAndReservesForeignExchangeEffect / us-gaap_ValuationAllowancesAndReservesTypeAxis = csiq_AllowanceForOtherReceivablesMember | 3,134 csiq_ValuationAllowancesAndReservesForeignExchangeEffect / us-gaap_ValuationAllowancesAndReservesTypeAxis = csiq_AllowanceForOtherReceivablesMember
Closing balance | $ 829,602 us-gaap_ValuationAllowancesAndReservesBalance / us-gaap_ValuationAllowancesAndReservesTypeAxis = csiq_AllowanceForOtherReceivablesMember | $ 887,024 us-gaap_ValuationAllowancesAndReservesBalance / us-gaap_ValuationAllowancesAndReservesTypeAxis = csiq_AllowanceForOtherReceivablesMember | $ 756,062 us-gaap_ValuationAllowancesAndReservesBalance / us-gaap_ValuationAllowancesAndReservesTypeAxis = csiq_AllowanceForOtherReceivablesMember

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- Definition Total of allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs which have been charged to costs and expenses net of the total of recoveries of amounts due the Entity that had previously been written off as uncollectible using allowances (the valuation accounts that are netted against the cost of an asset to value it at its carrying value) and total of reestablishments of reserves (liabilities established to represent expected future costs) that had previously been utilized. + References No definition available. + Details
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- Definition Total of the foreign exchange effects in a given period to allowances or reserves. + References No definition available. + Details
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- Definition Total of allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 09 -Article 12 + Details
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- Definition Total of the deductions in a given period to allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs, representing receivables written off as uncollectible and portions of the reserves utilized, respectively. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 09 -Article 12 + Details
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