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CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - USD ($) $ in Thousands | Common Shares | Treasury Stock | Additional Paid-in Capital | Retained Earnings Cumulative effect, adjustment | Retained Earnings | Accumulated Other Comprehensive Income (loss) | Earnings Attributable to Canadian Solar Inc. Cumulative effect, adjustment | Earnings Attributable to Canadian Solar Inc. | Non-Controlling Interest | Cumulative effect, adjustment | Total
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2017 |  | $ 702,162 |  |  |  | $ 417 |  | $ 383,681 | $ (54,034) |  | $ 1,032,226 | $ 27,549 |  | $ 1,059,775
Balance (in shares) at Dec. 31, 2017 |  | 58,496,685 |  |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net Income (loss) |  |  |  |  |  |  |  | 237,070 |  |  | 237,070 | 5,361 |  | 242,431
Foreign currency translation adjustment |  |  |  |  |  |  |  |  | (53,457) |  | (53,457) | 2,880 |  | (50,577)
Acquisition of subsidiaries |  |  |  |  |  |  |  |  |  |  |  | 7,703 |  | 7,703
Acquisition non-controlling interest's ownership |  |  |  |  |  |  |  |  |  |  |  | (6,591) |  | (6,591)
Share-based compensation |  |  |  |  |  | 10,258 |  |  |  |  | 10,258 |  |  | 10,258
Transfer of equity interest in subsidiaries to non-controlling shareholders |  |  |  |  |  |  |  |  |  |  |  | 10,470 |  | 10,470
Exercise of share options and RSUs |  | $ 769 |  |  |  |  |  |  |  |  | 769 |  |  | 769
Exercise of share options and RSUs (in shares) |  | 683,939 |  |  |  |  |  |  |  |  |  |  |  |
De-recognition of derivatives |  |  |  |  |  |  |  |  | (8,752) |  | (8,752) |  |  | (8,752)
Fair value change on derivatives |  |  |  |  |  |  |  |  | 6,094 |  | 6,094 |  |  | 6,094
Balance (ASU 2014-09) at Dec. 31, 2018 |  |  |  |  |  |  | $ 1,265 |  |  | $ 1,265 |  |  | $ 1,265 |
Balance at Dec. 31, 2018 |  | $ 702,931 |  |  |  | 10,675 |  | 622,016 | (110,149) |  | 1,225,473 | 47,372 |  | 1,272,845
Balance (in shares) at Dec. 31, 2018 |  | 59,180,624 |  |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net Income (loss) |  |  |  |  |  |  |  | 171,585 |  |  | 171,585 | (5,030) |  | 166,555
Foreign currency translation adjustment |  |  |  |  |  |  |  |  | 6,389 |  | 6,389 | (6,070) |  | 319
Acquisition non-controlling interest's ownership |  |  |  |  |  | (4,178) |  |  |  |  | (4,178) | (9,998) |  | (14,176)
Repurchase of common shares | [1] |  |  | $ (11,845) |  |  |  |  |  |  | (11,845) |  |  | $ (11,845)
Repurchase of common shares (in shares) |  | (609,516) | [1] | 609,516,000 | [1] |  |  |  |  |  |  |  |  | 609,516
Repurchase of treasury stock (shares) |  |  |  | 609,516,000 |  |  |  |  |  |  |  |  |  |
Share-based compensation |  |  |  |  |  | 10,682 |  |  |  |  | 10,682 |  |  | $ 10,682
Exercise of share options and RSUs |  | $ 875 |  |  |  |  |  |  |  |  | 875 |  |  | 875
Exercise of share options and RSUs (in shares) |  | 800,576 |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from non-controlling interests |  |  |  |  |  |  |  |  |  |  |  | 5,650 |  | 5,650
Fair value change on derivatives |  |  |  |  |  |  |  |  | (5,847) |  | (5,847) |  |  | (5,847)
Balance at Dec. 31, 2019 |  | $ 703,806 |  | $ (11,845) |  | 17,179 |  | 793,601 | (109,607) |  | 1,393,134 | 31,924 |  | $ 1,425,058
Balance (in shares) at Dec. 31, 2019 |  | 59,371,684 |  |  |  |  |  |  |  |  |  |  |  | 59,371,684
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net Income (loss) |  |  |  |  |  |  |  | 146,703 |  |  | 146,703 | 543 |  | $ 147,246
Foreign currency translation adjustment |  |  |  |  |  |  |  |  | 74,319 |  | 74,319 | 1,869 |  | 76,188
Acquisition non-controlling interest's ownership |  |  |  |  |  | (8,414) |  |  |  |  | (8,414) | 0 |  | (8,414)
Repurchase of common shares | [2] |  |  | $ (5,963) |  |  |  |  |  |  | (5,963) |  |  | (5,963)
Repurchase of common shares (in shares) | [2] | (381,330) |  | 381,330 |  |  |  |  |  |  |  |  |  |
Share-based compensation |  |  |  |  |  | 12,350 |  |  |  |  | 12,350 |  |  | 12,350
Transfer of equity interest in subsidiaries to non-controlling shareholders |  |  |  |  |  | (49,351) |  |  |  |  | (49,351) | 273,904 |  | 224,553
Exercise of share options and RSUs |  | $ 1,035 |  |  |  |  |  |  |  |  | 1,035 |  |  | 1,035
Exercise of share options and RSUs (in shares) |  | 830,030 |  |  |  |  |  |  |  |  |  |  |  |
Retirement of treasury stock (in shares) | [3] |  |  | (990,846,000) |  |  |  |  |  |  |  |  |  |
Retirement of treasury stock | [3] | $ (17,808) |  | $ 17,808 |  |  |  |  |  |  |  |  |  |
De-recognition of derivatives |  |  |  |  |  |  |  |  | (4,115) |  | (4,115) |  |  | (4,115)
Proceeds from non-controlling interests |  |  |  |  |  |  |  |  |  |  |  | 14,123 |  | 14,123
Fair value change on derivatives |  |  |  |  |  |  |  |  | 10,724 |  | 10,724 |  |  | 10,724
Balance at Dec. 31, 2020 |  | $ 687,033 |  |  |  | $ (28,236) |  | $ 940,304 | $ (28,679) |  | $ 1,570,422 | $ 322,363 |  | $ 1,892,785
Balance (in shares) at Dec. 31, 2020 |  | 59,820,384 |  |  |  |  |  |  |  |  |  |  |  | 59,820,384
[1] | Following the share repurchase plan authorized by the Board Directors on December 9, 2019, the Company repurchased 609,516 outstanding shares with total costs of $11,845 in December 2019. The Company retired all outstanding shares repurchased during 2020.
[2] | Following the share repurchase plan authorized by the Board Directors on December 9, 2019, the Company repurchased 91,424 and 289,906 outstanding shares with total costs of $2,000 and $3,963 in January 2020 and March 2020, respectively. The Company retired all outstanding shares repurchased during 2020.
[3] | On September 30, 2020, the Company announced a RMB1.78 billion (approximately $261,332) capital raising for CSI Solar Co., Ltd., to qualify it for the planned carve-out IPO in China and bring in leading institutional investors and strategic partners. Refer to Note 1 to the consolidated financial statements for further information.

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