INCOME TAXES - Movement of the valuation allowance (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Movement of allowances
Beginning of the year	$ 43,488
End of the year	72,678	$ 43,488
Allowance
Movement of allowances
Beginning of the year	43,488	45,682	$ 50,118
Reversals	28,819	(1,531)	(4,671)
Foreign exchange effect	371	(663)	235
End of the year	$ 72,678	$ 43,488	$ 45,682

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.

No definition available.

Name:	csiq_ValuationAllowancesAndReservesChargedToCostAndExpenseAndRecoveriesNet
Namespace Prefix:	csiq_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration