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Basic and diluted net earnings (loss) per share - Schedule of Earnings per Share (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Class of Stock [Line Items]        
Net earnings (loss) attributable to shareholders of AQN $ (33,387) $ 103,222 $ 57,578 $ 117,169
Series A and D Preferred shares dividend 2,220 2,276 4,440 4,490
Net earnings (loss) attributable to common shareholders of AQN – basic and diluted $ (35,607) $ 100,946 $ 53,138 $ 112,679
Weighted average number of shares        
Basic (in shares) 674,742,897 614,013,963 674,720,319 606,876,299
Effect of dilutive securities (in shares) 0 5,982,644 4,412,593 5,813,565
Diluted (in shares) 674,742,897 619,996,607 679,132,912 612,689,864
Series A preferred shares dividend        
Class of Stock [Line Items]        
Net earnings (loss) attributable to shareholders of AQN $ (33,387) $ 103,222 $ 57,578 $ 117,169
Series A and D Preferred shares dividend 1,219 1,249 2,437 2,464
Series D preferred shares dividend        
Class of Stock [Line Items]        
Series A and D Preferred shares dividend $ 1,001 $ 1,027 $ 2,003 $ 2,026