Quarterly report pursuant to Section 13 or 15(d)

Income taxes - Narrative (Details)

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Income taxes - Narrative (Details)
3 Months Ended 12 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2021
Income Taxes      
Effective income tax rate 84.40% 11.80% 20.80%
Foreign rate differential 21.00%