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Income taxes | 6 Months Ended
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Jun. 30, 2021
Income taxes |
Income taxes | Note 15 - Income taxes Income tax expense for the periods ended June 30, 2021 and 2020 was as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | For the three months ended | ​ | ​ | For the six months ended |
​ | ​ | June 30, | ​ | ​ | June 30, |
​ |  | 2021 | ​ | ​ |  |  | 2021 |  |  | 2020 |
Current income tax expense | ​ | $ | 15.2 | ​ | ​ | 10.1 | ​ | ​ | $ | 37.3 | ​ | ​ | $ | 24.5 | ​
Deferred income tax expense (recovery) | ​ |  | 14.2 | ​ | ​ | 1.4 | ​ | ​ | ​ | 11.9 | ​ | ​ | ​ | (57.9) | ​
Income tax expense (recovery) | ​ | $ | 29.4 | ​ | $ | 11.5 | ​ | ​ | $ | 49.2 | ​ | ​ | $ | (33.4) | ​
​ The Company is undergoing an audit by the Canada Revenue Agency of its 2012-2017 taxation years, as referenced in note 21.

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